Monster Buster Club
Beware of Frogs (1x23)
:
A mutated Earth frog (Herptilius) comes to Earth to seek vengeance on a chef that nearly cooked him years ago. Coincidentally, the chef turns out to be a replacement of Mr. Fusster (Who is on holiday) for science. The MBC Members must stop the frog, but he's invincible against anything, apart his weakness of Earth flies.
(this is episode 21 on DisneyXD USA)