Our everyman protagonist living in a world where Marvel and Capcom characters exist. Max's skill as a fighting game player and teacher have attracted the attention of all manner of heroes and villains.
Almighty Janitor / Badass Normal: Manages to hold his own against superpowered bioterrorists, zombies, and a Knight Templar from the future using nothing but his knowledge of fighting games. And occasionally an assault rifle.
Butt Monkey: Stuck with an obnoxious roommate? Check. Has to deal periodically with insane, psychotic supernatural beings? Check. Often pulled into one of Doom's plans and shenanigans? Check. Targeted by assassins for (so far) unknown reasons? Big check.
Ruler of Latveria, Master Scientist and... crasher of Max's apartment. This Dr. Doom is a little different from his more familiar counterparts.
Berserk Button: Taking his yogurt, messing with his pony figurines and hurting Strider will generally result in immediate Finger Lasers or flung arcade sticks.
Beware the Silly Ones: Although he mainly goofs off and rubs people the wrong way he is Doom and will kick some serious ass if things gets really dangerous. The fights against Wesker, Captain Commandonote While nerfed and Taskmaster should be more than enough to prove this.
Break the Badass: Suffers from this after Phoenix is easily mind-screwed. Whatever did that he's not eager to face.
Butt Monkey: Loses most of his Marvel 3 matches prior to Max's tutorial, punched by Chris and gets mauled in the face by Rocket Raccoon.
Iron Buttmonkey: He often either gets beaten or chastised by the guest characters for his dickness.
It's All About Me: He manages to have an ego rivalling Wesker's but without the A God I Am. Doom can't get enough about bragging how awesome he is and how he can curb-stomp anyone he feels like. Doom often pesters guests with this and ends up paying for it usually in hilarious fashion.
Animals Hate Him: Ammy simply mauls him the first time he tries to pet her like everyone else. Subverted after he starts living with Max, he sort of tame and gets her to calm down to the point she doesn't bite the neighbors anymore.
He's Back: After seasons of things going south for him, in Season 3 Wesker seems to be getting out of the Butt Monkey zone by tracking down who sent the assassins to kill Max and dropping most of his silliness.
Heel-Face Revolving Door: And how. Starts genuinely evil and threatening, then all of his plans goes to hell and he returns as Max and Doom are the closest thing he has to "friends", but then he tries to kill them as Doom discover he's working for Galactus and intending to use Nemesis to kill him and Max, then he is enclosed into the TV, then he saves Max and Doom from Deadpool and works alongside Doom and Strider to save Max's life from Taskmaster, M.O.D.O.K. and Deadpool.
Heel-Face Turn: Seems to have joined Max and Doom as a regular room mate after the events of Season 2.
Hidden Depths: A lot. He only tends to spill while he's anguished or plain drunk, though.
Made of Iron: Among his list of wounds are: broken jaw by Max's arcade stick, being seized and blasted by Doom's "human blender", being thrown into the TV and mauled by Nemesis and several zombies and shot several times by Taskmaster.
The Comically Serious: Once he starts living with Max and Doom. Seeing him doing house chores wearing a silly apron while on his S.T.A.R.S. uniform is pure gold.
The Dreaded: Butt Monkey or not he's still Albert Wesker and Chris understandably treats him as the threat he poses. A small advance against one of Chris' partners is enough to make him almost crap his pants. Enough for Wesker to leave with a grin that yells "I still got it".
Took a Level in Kindness: Little by little, but this is especially notable in the Season 2 finale. Not only he teams up with Doom and Strider to save Max's life, he also pays everyone tacos.
Tsundere: Yeah, you read it right. After his Heel-Face Turn in Deadpool's episode he starts living with Max and Doom and gets progressively closer to them. But being Wesker he'd never admit this.
Villain Decay: From a threatening near invincible superpowered bioterrorist to a roommate who shares space with two guys he previously tried to kill twice and not being able even to get a job as a janitor. Ouch.