From a Batman Beyond episode where Terry becomes the Man-Bat Beyond.
I think the episode was called Splicers. First Aired: 9/17/99
Gotham teens are crazy over "splicing", augmenting animal genes onto their own to change their appearance, thanks to the Chimera Institute. But the institute's sinister head, Dr. Cuvier is much more dangerous then he appears, and has the power to bring out the Bat in the Batman.