Batman/Teenage Mutant Ninja Turtles

Batman/Teenage Mutant Ninja Turtles is an animated crossover film based on the six-issue intercompany crossover comic book miniseries of the same name.

From Batman:

 * Alfred Pennyworth
 * Bane
 * Batman
 * Bats
 * Damian Wayne/Robin
 * Dr. Naveen Kahn (Only appearance; dies)
 * Gotham City Police Department
 * Commissioner Jim Gordon
 * Harley Quinn
 * Killer Croc
 * Goons
 * League of Assassins
 * Ra's al Ghul
 * Mad Hatter
 * Mahreen Zaheer
 * Martha Wayne (Appears only as a corpse) (Flashback only)
 * Mister Freeze
 * Penguin
 * Poison Ivy
 * Scarecrow
 * The Joker
 * The Riddler
 * Thomas Wayne (Appears only as a corpse) (Flashback only)
 * Two-Face
 * Ventriloquist
 * Wayne Enterprises
 * Lucius Fox
 * Wayne Industries

From Teenage Mutant Ninja Turtles:

 * April O'Neil
 * Bebop (Flashback only) (Cameo)
 * Casey Jones
 * Foot Clan
 * Shredder
 * Krang (Flashback only)
 * Ninja Turtles
 * Donatello
 * Leonardo
 * Michelangelo
 * Raphael
 * Rocksteady (Flashback only) (Cameo)
 * Splinter

Voice Cast

 * Alastair Duncan as Alfred Pennyworth
 * Carlos Alazraqui as Bane
 * David Warner as Ra's al Ghul
 * Fred Tatasciore as Killer Croc
 * Garry Chalk as Commissioner Jim Gordon
 * Greg Abbey as Raphael
 * Kevin Conroy as Batman
 * Laura Bailey as Poison Ivy
 * Mark Hamill as The Joker
 * Maurice LaMarche as Mister Freeze
 * Michael Sinterniklaas - Leonardo
 * Nolan North as Penguin
 * Phil LaMarr as Lucius Fox
 * Sam Riegel as Donatello
 * Stuart Allen as Damian Wayne/Robin
 * Tara Strong as Harley Quinn
 * Veronica Taylor as April O'Neil
 * Wayne Grayson as Michelangelo
 * TBA as Casey Jones
 * TBA as Mahreen Zaheer
 * TBA as Splinter