Where Danny is younger (12-ish) wants to be an entomologist (Insect Scientist) instead of an astronaut and develops a different core as a result...an Insect core!
Also, I kind of headcanon that Blobs are animal ghosts and Zone-born ghosts while Shades are intelligent Sapient ghosts who crossed over the the Infinite Realms.
• It all started when a blob got caught in the middle of a fight with one of his rouges. The little blob remembered Danny when he released it and a small bundles of them from his parents' traps. Intially, they saw the boy as an unusually powerful newborn predator, so they tended to stay away to avoid being eaten by him up until they realize he was purposely freeing several dozens of them from the bad human scientists with no sinister intent.
- They decide to form a symbiotic relationship with Danny by becoming a loyal swarm in the hopes of staying close to him as protection, as they are lowest on the food chain. The young Halfa has no idea they imprinted on him, he thinks they're just being extra friendly.
Blobidious (as Danny named him) and his group bring refined ambient ectoplasm and human food to their protector to keep both sides of the Halfa nourished. They unintentionally stole from random restaurants, stores, and homes for a little while until Danny catches wind of food going missing from people's houses and has to teach them to not do that. Though, the occasional Nasty Burger wouldn't hurt anyone...a small fee in the shape of a combo meal for keeping Amity Park safe, if you will.
- Thankfully, Sam and Tucker help by having food stuff stashed away in their rooms at their houses for the little battalion to grab for him when he's hungry, as his own home is to dangerous.
• As time passes, Danny's new ghost core slowly evolves to become a living hive/den for blob ghosts to live in where they rest after a day of successfully working on collecting nourishment for their protecter. With the area around his core becoming a small pocket dimension that serves as the main nesting area for them, adorned with a honeycomb pattern over its surface.
- Danny's human body has also evolved to hide the ecto signature of the swarm and himself as a defense mechanism, making the Fenton household defenses unable to detect their ecto signatures, much to his surprise and relief. When he transforms for the first time after his body successfully completes its metamorphosis, he appeared more insect-like in the beginning.
(Think like Devorah from MK series.)
Due to the nature of having a bestial core, he can transform into a large variety of Insect/Human forms and utilize their abilities via his Obsession with bugs. Danny's already insane strength and skill set being amplified by using the powers of the most unique insects on the planet.
• Danny's naturally produced ectoplasm from his body combined with the refined ambient ectoplasm collected by the swarm creates a ghost jelly. As he uses it to revitalize himself for the first time, the effects are almost instant, with wounds healing themselves rapidly and finding himself full of energy that lasts for days with no need for sleeping or eating. Due to the energy crash, he uses it sparingly, which causes an overflow resulting in a leaky core and him puke up the excess amounts.
Not wanting to have it happen again, he lets his swarm have the excess as reward for everything they've been doing for him, completely unaware of the hell he was gonna unleash on everyone with this offering to his little buddies.
• They proceed to evolve rapidly and become much more powerful as a result of eating the jelly. They begin to specialize and diversify their roles to better aid their boss to help him succeed and survive in Amity's ghost-ridden madness. Their symbiosis has resulted in Danny learning a form telepathy only he and the Swarm can communicate with.
From the simple blob ghost, Collectors, Warriors, Hunters, Scouts, and Workers arise to fill new roles. What's more astounding thing is the fact that they aren't just stronger, but have a higher intellect and can think and behave with reason, picking up on Danny's thought process and following his lead.
- Collectors are tasked to seek out ambient ectoplasm and food for the Danny. They also evolved in a way to leech it from hostile ghosts and follow hunters/soldiers to aid in subjugation. They can even drain humans attackers of their stamina and emotions, stripping them of their will to fight and leaving them unable to act.
- Soldiers are responsible for accompanying Danny to fights and following his orders on the field. They are also tasked with protecting the civilians from other ghosts looking to cause harm and evacuate the nearby area. The townsfolk were intially terrified, seeing monstrous ghost bugs, but calmed down knowing that they were Phantom's " pets", ready to defend them all.
- Hunters specialized in stealth, ambush and hit-and-run tactics, purposely venturing out into Amity Park and seek out his rouges in packs and dragging them back after paralyzing the offenders to be souped with a few Collectors in tow to squeeze 'em dry.
- Scouts are the crew that watched over Danny when he sleeps or when he's unable to transform into Phantom at the time, patrolling Amity Park for ghostly activity. If they saw/sensed a nearby ghost, they would emite a pheromone to alert the horde.
- Workers kept their intial blob form and stay inside Danny to be on standby to strengthen his body via nurturing it and repair it from the inside, taking the non-combat role; focusing on healing his wounds and making his body much more durable and healthy by merely being the caretakers of their boss. Thanks to their continued efforts, it increases the space for small pocket dimension to carry things he would need and increase the capacity for the swarm's hive.
His body is at its peak and the definition of perfect health. Perfect sight, hearing, strength with a quick healing factor for a boy young as he!
• Danny was intially surprised when the Swarm first came out of their volition to fight and was worried for them. But after seeing them pull a Cujo and transforming into Insect monsters of various sizes to beat down the unsuspecting victim rouge (Box Ghost), he's relieved that they're safe and he's excited that he's no longer alone in the literal fights against ghosts and that his friends don't have to jeopardize themselves without proper backup.
• Meanwhile, Danny's rouges are having an awful time in the wake of his growing bond to his Swarm. They can't enter the living world without a literal army of blob ghosts waiting for them to pop out the portal.
- Skulker tried to hunt them down only resulting in him getting his suit torn to shreds by the Welp (Phantom/Danny) when one of his blobs got hurt by the hunter's stray shot.
- Ember tried to pull a Pied Piper and force them under her control, but it only resulted in her guitar getting badly damaged and her ectoplasm sucked out of her by the Collectors.
- Spectra and Bertrand developed a severe phobia of insects after they brought her scheme crashing down and nearly killed them both after she tried to manipulate Danny like in canon, reveling in his despair until it brought the full fury of the swarm to make the attempt to destroy her when she made him upset. The swarm would've succeeded if Danny didn't call them off and she hasn't returned from the Zone since.
- Technus kept having his machines melted by corrosive acid being spat at him and ripped apart with the insane bite force of the insects assaulting him.
- The only one who managed to get passed them was Cujo. The pup's obsession wasn't destructive in nature and took a liking to Phantom and his hundreds of friends, even going as far as to acknowledge Phantom and even listen to him, making him get a pass while the others were stuck in the Zone, totally not jealous.
• The ghost pup was able to be stopped by Danny and the Swarm before he could destroy Axion Labs, making Val see the infamous "Spectral Skitter" in a more positive light.
She was a little mad, but seeing Phantom laughing as he gave the ghost puppy his favorite toy gave her a somber reminder that they both, the puppy and the ghost boy, had died way too soon. Val would still become Red Huntress, but less out of revenge, but to find out more about Phantom, becoming the 4th person to know Danny's secret.
• Vlad is rather good in this au! The sting of Jack and Maddie's abandonment made him a recluse and he refused to try and find happiness out of fear of being abandoned again. Causing his once green ectoplasm to become a shade of violet, as it was his pent up love made manifest.
- But Vlad wouldn't let that stop him, nor would it hold him back in life! He came into his own in Wisconsin after starting a successful chain of brands revolving around dairy goods, using a small portion of the earned funding to research ghosts in his free time using actual methods of study and not the havoc he's heard regarding a certain set of ectobiologists. He honestly can't help but be worried about young Daniel and Jasmine. He can only imagine that whirlwind of a life the children must have, having his former friends as parents.
- After making enough progress, his therapist suggests Vlad getting back out there and try giving the socializing scene another shot, as the Halfa himself mentioned that he missed companionship during their last meeting. Being socially inept, he decides to transform and look around for potential associates while invisible. So lost in thought that he ended up in Illinois on accident when his ghost sense went off like a bomb.
- He jaw fell open when he couldn't believe what he was seeing. He saw giant ghost insectoids that were taking down several Ecto beasts being led by Skulker, who seemed to have tamed (intimidated) them to his side. Another group was taking the people far away from the fighting and standing guard over them. Despite his curiosity being peaked, Vlad couldn't help but groan loudly and facepalm. The tin can tried skinning the older halfa in the past, only for it to end with the said Halfa threatening to destroy the little nuisance's core if he kept it up. He hadn't had a problem since, but seeing the "Greatest Hunter" again made his eye twitch something fierce.
"When I get that welp's pelt I'll–"
"Prove to everyone that you're the greatest hunter ever and yada yada yada...Soup Time!"
Along with his defeated beasts, Skulker is absorbed into the Fenton Thermos and Phantom powers down back into his human form after hiding in a nearby alley...not even realizing that Vlad just saw him do that.
• Vlad immediately knows that this is Daniel Fenton, due to looking up the Fentonworks Website in the 'About Us' page and seeing the major similarities between the "two" boys". He also knows that Phantom is labeled as the "Ghost Menace"...who was constantly being hunted by Jack and Madeline, getting shot at like it's open season, causing needless destruction in their wake...like how they tried to hunt him a few years prior...
- Knowing Jack and Madeline, This makes poor Vlad's mood go from bad to infinitely worse because that meant that they had no idea that they've killed their own child (like him, oof) and have been hunting him since his first appearance in Amity. He immediately retreats back to his castle and has a severe panic attack.
• After calming down, Vlad will probably try to murder his old friends like in canon by inviting the family to his place, but it comes from a messed up sense of needing to protect Danny from his disastrous parents, seeing the younger as a victim of his parents recklessness. It takes a lot of convincing, but Danny is able to get him to stand down and explain that his parents aren't as dangerous as he says they are. Except Vlad had made very good counterarguments that made the younger Halfa question the doubts he had about his parents.
- It doesn't help that the original members of his swarm don't answer when he asks for a biased opinion in his favor. Surely his folks would still love him once he tells them what happened down in the lab...right? Danny makes the protocol "Friend or Foe" with Sam and Tucker and creates a guideline depending on which way the wind blows that fated day.
- Vlad gave him his number, a key, and a room for him to stay at the castle should he be inclined to take the offer should the worse come to pass. Telling the young badger that he had a place to retreat to in case things goes sideways and someone willing to train him as well.
• Jack and Maddie are up to their usual activities, but they meet more resistance by both the ghosts and people of Amity Park.
- The blob ghosts they usually catch to turn their ectoplasm to power their weapons or experiment on have made an alliance with Ghost Boy, Phantom, who made them far more powerful and elusive than they previously were. It doesn't help that their failed attempts to grab one usually end up with some form of property/vehicle damage while Phantom and his monsters scatter and vanish as soon as they arrive.
- People are genuinely looking to the literal ghost child (Phantom) for protection and has been keeping the streets of Amity Park safe from ghosts more than the proclaimed "Ghost Experts". He even began rehabilitating most of his old enemies at this point and helped them find non harmful methods for them to fulfill their obsessions at this point of the timeline. They couldn't defeat him or his army, so they yielded and gave his methods a chance with good degrees of success.
When a curious person (Jazz, the daughter of the town ghost experts) "asked" about a ghost's obsessions and why they fight, Danny goes into extreme detail (thank you, Clockwork and Pandora!) about why it is a ghost would do the things they do, debunking many ectobiologists theories and scientific discoveries made by the field of study.
• It felt like a slap in face and all their hard work was being undermined.
- This causes a screaming match between Maddie and Phantom. Both who are refusing to back down and causing a crowd to form.
"You're kind are danger to humans!"
"Have you seen how you nutjobs drive!? There's a reason nobody parks their cars on your street! You're a living road hazard!"
"You ghosts have been terrorizing the town!"
"Excuse me!? We've been PROTECTING it from your mistakes! Maybe if you actually studied ghosts instead of labeling us non sentient and cutting us up and making them live ammunition, you'd get better results!"
• It just keeps going until something in Danny starts snapping. He's already past sobbing and red in the face with panic and anger, the swarm is practically going feral as they sense the distress rolling off of him in waves, waiting for these humans to dare to make a move. Snarling, hissing and growling could be heard from hundreds of creatures slowly manifesting in the sky, floating with eyes glowing blood red.
People begin to start to worry out as they never seen Phantom's pets like this before...but then again...holding guns up to a kid who died recently and protects them from both the ghosts and the Fenton's daily madness isn't exactly a good image.
"You may have fooled everyone else, but you haven't fooled us, Phantom Menace! If we let our guard down, your kind will exploit us and we'll all be paying for it!"
And just like that...the final thread self control snaps and Phantom explodes. His scream of anger is amplified by his swarm and takes out most of the devices powered by ectoplasm.
Pay for it...PAY FOR IT!? WHAT DO YOU NOW ABOUT "PAYING FOR IT" WHEN ALL THIS WAS ALL YOUR FAULT!? ALL BECAUSE YOU MADE A LITERAL PORTAL TO HELL! YOU'RE SO OBSESSED WITH GHOSTS YOU HAVEN'T EVEN NOTICED WHAT'S WRONG WITH ME..."
The silence that came after was deafening and as the "good doctors" try to object, they themselves are stunned into silence as well when a ring forms around Phantom's waist and reveals who he actually is. Gasps and shouts of surprise are heard as a teary eyed boy stares down at his parents from a roof, glaring icy daggers with tired eyes.
"You were always in the lab, for days on end, as Jazz and I grew up. She put up with it and accepted the fact that work took priority, but I didn't! I hated that stupid portal and I went into the damn thing trying to make it work so you could pay attention to us again...but it turned on with me inside because a "genius" put the power button inside...which I hit on accident...making me die alone!
My grades dropped off a cliff because I had to step up and take responsibility for YOUR obsession with ghosts! I lost so much sleep because there were threats almost every other day trying to cause problems for Amity Park! Jazz was almost murdered and I almost had to kill the ghost to stop her from harming my sister! I had to literally beat my rogue's gallery into submission so they could behave and to protect them from ghost hunters so I could get to live a semi-normal life again! My so-called evil "parasites" have been helping me out keeping everyone who saw me as some weird freak safe since we teamed up and I won't let you slander them or myself anymore!"
It made the people of Amity feel sick to know the truth. The small kid who likes bugs who was supposed to barely start high school was the same friendly ghost who constantly charged into battle to keep everyone safe. His friends and enemies alike were under his protection out of the kindness of his heart when he could've easily used his powers for mischief, or worse, evil. As the realization began to sink in, people began to whisper and mutter to each other.
"An actual kid was defending us the whole time!?"
"Bug-a-Boo was really just a kid..."
"Danny Fenton is the Spectral Skitter!?"
"THEY KILLED THERE OWN KID!?"
That's what made people turn on the Fentons with the looks of disdain and anger. People were forming a protective ring around Danny as they continued to bombard his family with accusations and throwing insults. "Hey, Jazz is innocent in all of this, so leave her out of the hate mob! My sister barely found out and has been taking care of me better than our own parents well before I died...was there for me when things were at their worst fighting back the ghost..."
As the two Fenton siblings looked at each with soft, reassuring smiles, the tender moment was ruined when a blast went off, screams were heard and Danny stumbled back in shock at the sudden pain and blood blooming in his chest. It didn't punch through him fully, but cracked his ribs and now he was on the ground in pain. The shooters fate was sealed when a soldier's stinger punched through the attacker's leg with an ecto blast before the swarm and began fighting men in white suits, the attackers being overrun quickly and being mangled savagely before stopping at Danny's order before fainting.
In their desperate attempt to get Danny to safety, the swarm grabbed his unconscious body and hurriedly went through the Ghost Portal before blowing it up, preventing the Guys in White from doing more damage. There, they were greeted by Danny's greatest ally, Clockwork, and Yeti named Frostbite who wished to help their Boss. With reluctance and cries of sadness, they gave him to the beastman and hoped for the best.
