The Fairly OddParents/Fanboy and Chum Chum

Cast

 * Cosmo as Fanboy (Cosmo and Fanboy are both green)
 * Timmy Turner as Chum Chum (Timmy and Chum Chum both have brown hair)
 * Wanda as Yo (Wanda and Yo are both Pink)
 * AJ as Kyle Bloodworth-Thomason
 * Remy Buxaplenty as Sigmund The Sorcerer (Remy Buxaplenty and Sigmund The Sorcerer are both Rich and Snobbish Children)
 * Tootie as Lupe (Tootie and Lupe both have black hair)
 * Veronica as Cher Leader
 * Mr. Turner as Oz
 * Trixie as Francine (Trixie and Francine both have "r" and "i" in the middle and "e" at the end of their names)
 * Vicky as Marsha (Vicky and Marsha are both considered morbid)
 * Francis as Boog
 * Mr. Crocker as The Global Warmer