From Webkinz Insider Wiki
Gato Loco (Spanish for Crazy Cat) is featured in the games Candy Bash and Candy Bash 2. In the first, he is the antagonist: the person who stole Poncho's candy. In the second, he swings across the screen carrying power-ups or the Candy Bash 2 Trophy. That is currently his only role in Webkinz World. Gato Loco is a black and white cat with a mustache and sombrero.He is described by Ganz as follows:
The Gato Loco is Poncho’s arch-nemesis in Candy Bash. This crazy kitty is always trying to steal Poncho’s delicious candy!