Batman/The Fairly OddParents

Heroes
Bruce Wayne/Batman as Timmy

Alfred Pennyworth as Mr. Turner

Commisioner James Gordon as Jorgen

Detective Harvey Bullock as Cupid

Dick Grayson/Robin as Chester

Terry McGinnis/Batman Beyond as Sparky

Villains
The Joker as Mr. Crocker

Oswald Chesterfield Cobblepot/the Penguin as Pokernatior

Selina Kyle/Catwoman as Trixie

Harvey Dent/Two-Face as A.J.

Dr. Pamela Lillian Isley/Poison Ivy as Wanda

Dr. Johnathan Crane/the Scarecrow as Cosmo

Waylon Jones/Killer Croc as Francis

Mary Dahl/Baby Doll as Vicky (Both are secretly evil)