Its the Super Smash Bros of Newgrounds...
Its a great game. I loved playing it.
I'd only say two things though: add more characters and make the story longer.
I could see Darwin, Uberkid, Retarded Animal Babies (preferably Puppy), Burnt Face Man, Wonchop, Cycon (Project DCK), Joanime (even though I havent seen her on newgrounds in a while) and Hank (Madness Dude.... This one's a no brainer...) in this game easily. I know you were going with the most important characters, but... sequal?
Also, I know you were probebly leaning away from SSB, but the story could use a static Final Boss, Like Master Hand. Fighting Tom Fulp at the end would be a great ending and would probebly build a great story onto why we are attacking him in the first place.
Great concept, Excelent game. Keep on kicking ass!