Ace Ventura - The Mask: The Animated Series

In the episodes "The Aceman Cometh/Have Mask, Will Travel" of The Mask: The animated series, when Milo, the pet dog of Stanley Ipkiss, was stolen by Dr. Pretorius, Ipkiss calls Ace for help. Both Ipkiss/the Mask and Ace Ventura were the animated versions of characters portrayed by Jim Carrey himself. Ace later accidentally wears the mask on his rump, which assumes a face similar to his own and gains the ability to speak, suggesting a joke featured in the original film of speaking while presenting his rump to the listener and moving it in semblance of a speaking mouth.