Nicktoons/Marvel

Cast: More ideas?
 * Timmy Turner/Arachnid-Kid as Peter Parker/Spider-Man (In Abra-Catastrophe, Timmy dressed up like Spider-Man; Ultimate Spider-Man is voiced by Drake Bell, who played Timmy in A Fairly Odd Movie)
 * Dudley Puppy/Iron Mutt as Tony Stark/Iron Man (watch T.U.F.F. Puppy's Iron Mutt episode)
 * Keswick as War Machine
 * Jimmy Neutron/Hulk Jimmy as Bruce Banner/Hulk (watch Jimmy Neutron's The N-Men episode)
 * The N-Men as the agents of S.M.A.S.H.
 * Tommy Pickles as Steve Rogers/Captain America (the Capt. was the 1st Marvel character with a movie; Rugrats was the 1st Nicktoon with a movie)
 * SpongeBob SquarePants as Thor (Thor made a reference to SpongeBob in a comic strip)
 * Jenny Wakeman/XJ9 as Natasha Ramanoff/Black Widow
 * Avatar Aang as Clint Barton/Hawkeye (he has an arrow on his head, so he is now the Last ARROW-bender!)
 * Manny Rivera/El Tigre as T'Challa/the Black Panther
 * Frida Suarez as Ororo Iqadi T'Challa/Storm
 * Mr. X as Scott Summers/Cyclops
 * Mrs. X as Jean Grey-Summers/Pheonix
 * Tuesday X as Anna Marie Darkholme/Rogue
 * Truman X as Logan Howlett/Wolverine
 * Rex X as Hank McCoy/Beast
 * Home Base as Professor X
 * Invader Zim as Wade Wilson/Deadpool
 * Bessie Higgenbottom/the Mighty Bee as Janet van Dyne/the Wasp
 * Rocko the Wallaby as Hank Pym/Ant-Man
 * Doug Funnie as Nick Fury
 * Skeeter Valentine as Phil Coulson
 * Patty Mayonnaise as Maria Hill
 * Squid Dullard as Reed Richards/Mr. Fantastic
 * Reggie Rocket as Sue Storm/the Invisible Woman
 * Otto Rocket as Johnny Storm/the Human Torch
 * Twister Rodriguez as Ben Grimm/the Thing
 * Ginger Foutley as Carol Danvers/Ms. Marvel
 * Danny Fenton/Danny Phantom as Johnny Blaze/Ghost Rider
 * Arnold Shortman as Matt Murdock/Daredevil (they both 'lost' a relative)
 * Helga Pataki as Elektra Natchios
 * CatDog as Frank Castle/the Punisher
 * Tak as Eric Brooks/Blade
 * Ickis as Ted Sallis/Man-Thing
 * Snap (ChalkZone) as Howard the Duck