Batman is one of the DC Comics hero. He appeared in two Scooby-Doo Episodes.
The Dynamic Scooby-Doo Affair
Here he and Robin helped the gang solve a mystery with counterfieters and fight Joker and Penguin
The Caped Crusader Caper
Here he helped the gang finding a missing proffesor who was kidnapped by Joker and Penguin.More Info about Batman here