The whole process:
Original Under cut:

seen from Netherlands
seen from United States
seen from Syria
seen from Germany
seen from Türkiye

seen from T1

seen from Russia
seen from United States
seen from Germany

seen from Türkiye

seen from United States
seen from Russia
seen from United States
seen from China
seen from Spain

seen from Canada

seen from United States
seen from United States
seen from Russia
seen from United States
The whole process:
Original Under cut:
why won't yoshi look me in the eye
Mr. L
He is a major antagonist and eventually becomes the game's final boss, Super Dimentio by fusing with Dimentio and the Chaos Heart. Before turning evil, Luigi tries to stop Count Bleck from using the Chaos Heart; however, after being trapped in Castle Bleck, Luigi gets brainwashed by Nastasia, ultimately turning him into Mr. L.
Mr. L is very cocky and is always praising up himself, a stark contrast to the chicken-hearted, reluctantly brave Luigi. He thinks highly of himself and is not slow to reveal it, often trying to openly annoy other in-game characters. He has a belief in his often-boasted-of abilities, as he is very shocked at his failures as their series begins. He is very daring, and as such reveals an attraction to Princess Peach and jealousy of Mario's jumping ability. (But if he jumps better than Mario)
Mr. L has two catchphrases: "L-ater," which he continuously proclaims when exiting , and "Have at you!", his battle cry.
He also has a knack for nicknaming, referring to Mario as "Mr. Jumpsallthetime," Peach as "Ms. Alwaysgetskidnapped," or Bowser as "Mr. Getsfoiledallthetimebytheredguywiththemoustache" during their first confrontation; this may imply that he still retains some of his memory from when he was Luigi, as he subconsciously recognizes who Mario, Peach, and Bowser are. He also nicknames himself "the Green Thunder".
However, Mr. L has some skills that Luigi does not, or merely has not yet shown, namely his inventiveness. Though Luigi has been known that he used his abilities in previous games, his mechanical skills haven't been consistently shown to match that of Mr. L. Mr. L has the intelligence to build, upgrade, and pilot his own robot, which he calls Brobot, throughout the course of the story pioneering the art he refers to as brobotics.
Mr. L strongly resembles Luigi, though he is dressed in a black jumpsuit that strangely retains his former overalls' large buttons. He also wears a green bandana around his neck. His cap has a black background and reversed "L" instead of the normal white background and normal "L". Over his face is a black mask which seems to effectively hide his identity; this mask makes his eyes and eyebrows appear white. His gloves and shoes are dark gray. Mr. L, unlike standard Luigi, is shown to have a belt.
It is implied several times that Luigi is the "man in green", referenced in both the Light Prognosticus and the Dark Prognosticus. Both of these two books state that this man in green and his affiliations will determine which prophecy is true. As such, it can be taken that, if Luigi were to have stayed Mr. L throughout the course of the game, the Dark Prognosticus would have been fulfilled and all worlds would be destroyed, making the end of Luigi's hypnotizing and evil ways integral to Super Paper Mario. Dimentio additionally states that the Dark Prognosticus mentions Luigi as the ideal host for the Chaos Heart.
In the final battle, with help from Count Bleck and his minions, the heroes are able to summon the to destroy Dimentio and the Chaos Heart, bring back Luigi and finally erasing his hypnosis and brainwashing.
Additional information:
Catch card:
HP Max: 40
Attack: 3
Defense:
Score: 200
Card description: So...who's this mysterious Mr. L character? Is this what the Prognosticus foretold?
Tattle: That's Mr. L. This new hire of Count Bleck's a real mystery man... Max HP is 40. Attack is 3. He uses his high jump as a weapon... And that powered-up super jump is quite...super... He has no other outstanding features of note. And why does he remind me so much of Mario...?
Quotes:
"Oh, me? Just one of Count Bleck's more promising minions. The Green Thunder... MR. L!"
"Just because you're in red doesn't mean you're strong. Have at you!"
"Ooh, the evil king of all charlatans! Do I look scared? Have at you!"
"No one's coming to save you this time, dearest princess! Have at you!"
"Hey, Mr. Jumpsallthetime! NOW we'll see who's the better jumper!"
"Hey, Mr. Getsfoiledallthetimebytheredguywiththemustache! I'll foil your FACE!"
"Hey, Ms. Pink n' Frilly! Try not to get kidnapped before I defeat you! Have at you!"
"Hey, Ms. Alwayskidnapped! I'll kidnap your FACE!"
"I uh... got to go deflavorize the Brobot's uh... Flavorizer."
"Hey there, butterball!"
"Hey, King Incompetent! I'm gonna hatch an evil plan on your FACE! Have at you!"
"I was just scouting him, dear. Next time, he will be mine!"
"But Brobot craves his daily smash! I can't just loiter here! There's no action!"
"L-ater!" - Mr. L
"Looks like your Pure Heart thing got broken. I guess Pure Hearts can't handle the end of the world. Heh. Whatever, I'll swipe it just for kicks."
"Meet my new friend... BROBOT L-TYPE!"
"Not a funny joke, Dimentio... If I wanted to laugh, your face is inspiration enough!"
"Dimentio... No..."
Fun facts about him:
Mr. L's mustache as black whereas Luigi's artwork gives him a brown mustache. In game, however, both forms' mustaches are brown.
Mr. L shares many similarities with Lord Crump from Paper Mario: The Thousand-Year Door, in that both of them are arrogant underlings of their games' primary antagonists, both command massive mechanical creations as well as updated versions of them, and both of them don disguises that are fairly easy to see through by the player, so much so that Mario's partners often lampshade it.
Mr. L's self-given nickname could be a reference to Luigi's Thunderhand ability from Mario & Luigi: Superstar Saga.
Shadoo's first form (Dark Luigi) looks identical to Mr. L instead of normal Luigi.
(A/N): I don't have any theories about him, although of course I would accept some suggestions =)
Has anyone noticed Barrys eyes Look different ingame and on His Wiki?
Wiki one won btw!! Hes Not gonna Change from how I used to Draw him (yayy)
This Is a finished Debate but id still Love to hear anyones opinion on Here too!!
Wiki
ingame
I feel like I should remember this riff on the old Bowser article from the Mario Wiki every time I have the urge to describe a Touhou character in the edgiest way possible.
HAL 9001, a computer/pizza making machine built by Einstein in the Super Mario Bros. Super Show. HAL was defective and always put fried eggs and anchovies on its pizzas unless specifically asked not to. It also produced a number of bizarre pizzas, such as golf pencil pizza, and is capable of hypnotizing the Mario Bros.
Yoshi vs Yoshi winning