Batman/Teenage Mutant Ninja Turtles

Batman & TMNT: Heroes Unite is a crossover film.

From Batman:

 * Kevin Conroy as Batman
 * as Alfred
 * Scott Menville as Robin
 * Tara Strong as Batgirl, Vicky Vale
 * as Joker
 * Grey DeLisle as Catwoman
 * as Penguin
 * as Two-Face
 * Tasia Valenza as Poison Ivy
 * as James Gordon

From Teenage Mutant Ninja Turtles:

 * as Leonardo
 * as Michelangelo
 * as Donatello
 * as Raphael
 * as Splinter
 * Mae Whitman as April O'Neil
 * Kevin Michael Richardson as Shredder
 * as Kraang
 * as Casey Jones
 * Kate Micucci as Irma Langinstein
 * as Fishface
 * as Rahzar