Untitled Mew Mew Power/Batman Crossover

Untitled Mew Mew Power/Batman Crossover is a Japanese television film produced by Studio Pierrot, that features characters from DC Comics Batman, specifically in their DC animated universe incarnations.

Summary
Dren, Tarb, and Sardon frees all the inmates of Arkham Asylum

From Mew Mew Power:

 * Ichigo Momomiya/Zoey Hanson
 * Mint Aizawa/Corina Bucksworth
 * Lettuce Midorikawa/Bridget Verdant
 * Pudding Fong/Kikki Benjamin
 * Zakuro Fujiwara/Renee Roberts
 * Kishu/Dren
 * Taruto/Tarb
 * Pai/Sardon
 * Deep Blue (mentioned)
 * Blue Knight
 * Ryo Shirogane/Elliot Grant
 * Keiichiro Akasaka/Wesley J. Coodridge III
 * Masha/Mini-Mew

From Batman:

 * Batman/Bruce Wayne
 * Nightwing/Dick Grayson
 * Alfred Pennyworth
 * Commissioner James Gordon
 * The Joker
 * Catwoman
 * Two-Face
 * Poison Ivy
 * Killer Croc

Trivia

 * None of the voice actors from the DC animated universe shows reprised their roles in the special. The reason for that is because the original actors are LA Union voice actors from California and so it became too expensive and they would require a contract due to the logistics of 4Kids residing in New York City and the actors residing in Los Angeles. 4Kids is unable to hire union actors, stated by some reports, since they cannot afford them and the actors could only work in union projects, so they had to hire replacements for all of them.