Wiggles the rabbit is Moo Moo the magician's pet rabbit that he uses in his magic show. After introducing his pet in a magic show, Wiggles wiggles his ears, suggesting that that's why Moo Moo named him Wiggles.
Wiggles the Rabbit is a plain white rabbit with a black nose.
The only episode that Wiggles is mentioned by name is in The Tired Tail. Moo Moo hides Wiggles in one of three magic hats and a volunteer (Wubbzy) is supposed to find him while the magic hats magically circle overhead.
In Magic Tricks, Moo Moo also pulls a rabbit out of his hat that looks like Wiggles. His students do the same, except for Wubbzy. Widget pulls out a whole bunch of rabbits!