"another Danny Phantom x Batfamily's crossover idea"
Danny—wounded, exhausted, without support, and being hunted by the GIW after miraculously escaping from their lab before they could destroy his core—ends up in Gotham, the place with the second-highest concentration of ambient ectoplasm.
With his last ounce of strength, he manages to reach the gate of Wayne Manor, where he calls Damian—his twin, his ahki—on the intercom.
The next few hours feel like a blur. A warm, firm body, almost identical to his own (before the accident), picks him up and carries him into a house so spacious it would put Vlad to shame. They take him down several floors until they reach a slightly cooler, darker place, where they lay him on a stretcher, hook him up to machines, and treat his wounds as best they can while Danny stammers out information about his physiology so that whoever is tending to him won’t be alarmed by his dangerously low heart rate.
He doesn’t know when his eyes closed, but he’s glad that the last thing he sees is his ahki’s face, even though it’s etched with worry.
Timmy steps through a portal into Danny’s world, planning to pick up the Crash Nebula comics he’d lent him. However, Danny isn’t in his room, he isn’t at home, his friends haven’t seen him in days, and after walking for a long time, it’s obvious that Danny isn’t in Amity Park.
But Timmy doesn’t give up; without hesitation, he wishes for a “Danny radar,” but he’s confused when it points to a place far away—a place called Gotham. Worried about his best friend and big brother figure, he wishes to go wherever Danny is. His worry and confusion only grow when he finds himself in a strange, empty infirmary, with the only occupied bed in front of him occupied by an unconscious Danny.
He approaches him and tries to wake him up, but without success. He can’t take him away because he looks so weak (he may not be the brightest, but he knows enough to realize that the machines he’s connected up to are there to help him), nor does he want to leave him here in this strange place.
He makes a decision. Going over da rules he’s memorized, he makes a specific wish: “to give Danny the energy so his body can heal his wounds.” Then, using an old wish, he becomes invisible and hides on top of a shelf. From there, he watches silently as a boy who looks almost exactly like Danny appears, checks on him, and then calls over a man in a butler’s suit who also checks on Danny. Both are clearly surprised that he seems to be healing a little faster.
When the other boy (Danny’s clone?!) finally leaves, Timmy climbs down from the shelf and approaches Danny, becoming visible again.
When Danny opens his eyes again, he feels much better than before, but that isn’t the first thing he notices—instead, he sees his pseudo-little brother from another dimension staring intently at him. Danny asks him why he’s there, and then hears the story of how Timmy came looking for a comic book, searched all over Amity Park for Danny, and finally found him here; he healed him a little and then hid, only to see someone identical to him appear and check his wounds alongside a butler.
Danny tries not to laugh, but only because it would hurt. Then he explains to Timmy why he’s there and who the boy who looks exactly like him is, as well as the secret identities of the whole family as vigilantes—just for fun (and because he trusts Timmy to keep the secret as tight as a vault). Timmy, being the kid he is, quickly goes from disbelief to amazement and excitement at the idea that his friend has a twin and a family of vigilantes.
They talk a little more, but Danny can’t convince him to go home before they hear footsteps heading toward the infirmary. Quickly, Timmy hides again, just before Damian appears. Damian doesn’t look at Danny; instead, he looks all around, searching for something, and when he doesn’t find it, he asks Danny directly who he was talking to.
Danny doesn’t try to lie to Damian—he knows it’s useless—but he doesn’t fully reveal who the person is or where they are either. He just assures Damian that it’s a friend and that they won’t cause any harm.
Damian clearly doesn’t like not knowing, but he lets it go. He checks on Danny; they talk a little, and even though he clearly doesn’t want to, he leaves again.
The next few days are the same: Danny sleeps a lot, but every time he wakes up, he feels more revitalized than before, and he knows it’s Timmy. Timmy doesn’t leave; he shows up to talk to Danny when he’s alone and hides before anyone arrives. Damian pops up randomly, clearly trying to catch the “intruder,” but he never succeeds. After the first day, Alfred brings food for two to Danny and winks at him as he leaves the room. Danny’s sure that this man can read minds or something like that, but he doesn’t have any proof yet.
Finally, on the third day, Timmy feels comfortable enough to reveal himself to Damian. Somehow, they get along well, united by their love for Danny, and although it hurts him to think that his twin has replaced him, Danny quickly makes him understand that this isn’t true. He has a favorite twin and a favorite little brother; both are different and unique, and he loves them equally.
As time goes on and Danny recovers further, Timmy introduces himself to the rest of the Bats one by one, saving Bruce for last.
This is what I have so far for this story; I suppose the ending will be that Bruce formally adopts Danny and Timmy as well.
*Timmy lives with his parents, but they’re neglectful, and the only reason Timmy is still alive and well is thanks to Cosmo and Wanda.
*If Bruce doesn’t adopt Timmy, then his godparents will invoke a clause in da rules that allows them to adopt a godchild if the parents are a risk to the child.
*Timmy is quite clever. He may not be the sharpest tool in the shed (especially with his ADHD and dyslexia), but he’s an expert liar. Not even Cass or Bruce can tell with 100% certainty whether he’s lying or not, because Timmy has learned to convince himself of his own lies to make them more believable. He also has a vivid imagination; he’s memorized da rules and, as a result, no longer makes random or vague wishes, but structures them in such a way that they do exactly what he needs without breaking da rules (he’s a genie’s worst nightmare).
*Danny feels great affection for Timmy and sees him as part of his “fraid bond,” placing him on par with Damian in importance. He knew who his father was and where Damian was, but he never dared to look for them so as not to put them in danger—not to mention having to take care of Amity Park.
*Damian is suspicious of Timmy at first, especially because what he says sounds strange or made up, but over time their mutual affection for Danny brings them together. He didn’t know where Danny was, but he couldn’t look for him either because Talia and his grandfather prohibited him from doing so.
*At this point, Bruce is hardly surprised by yet another son, much less that this one comes with an extra one. All he hopes is that these will be the last ones—he’s getting old.
*The others are surprised that Damian has a twin, especially since he seems to be his polar opposite in personality, but they quickly adjust to the new little brother. It takes them a little longer to accept Timmy, simply because the boy is clearly keeping secrets and knows more than he lets on.
