Doraemon & Batman: World's Finest

Doraemon & Batman: World's Finest is a television special of the anime series Doraemon, that features characters from Batman.

Summary
With Doraemon's invention, he and Nobita, Gian, Suneo, and Shizuka explore inside different comics. Unfortunately, Doraemon's machine allowed Batman's foes to come to the real world and wreak havoc. In order to reverse the change, Doraemon and gang brings in Batman to help capture the villains.