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:

 * Seth Green as Leonardo
 * Rob Paulsen as Donatello
 * Sean Astin as Raphael
 * Greg Cipes as Michelangelo
 * Hoon Lee as Splinter
 * Mae Whitman as April O'Neil
 * Josh Peck as Casey Jones
 * Kate Micucci as Irma Langinstein
 * Kevin Michael Richardson as Shredder
 * Clancy Brown as Rahzar
 * Christian Lanz as Fishface
 * Nolan North as Kraang