And the animal is...a bad guy????

Mason and I love to play the game "Guess what animal I'm thinking of." When it was his turn to pick an animal today I deciphered from clues that the animal had the following characteristics:

1. It lives in the jungle
2. Is purple with pink on top
3. Likes to swim in the water
4. Says "waa - taa, waa - taa"
5. Walks on five legs

What animal is this you say? I was similarly puzzled. When I couldn't guess the animal correctly, Mason had to give me the answer - a bad guy! I love his imagination lately, but sometimes its hard for me to play along!