Why Is Cuddles A Guinea Pig?

Cuddles is a nigh-omnipotent cosmic guinea pig from Cosmic Delivery Boy. If you want to know what he can do, the answer is that he can do basically anything. His species were the victors of a war that went on for aeons and spanned the entire multiverse. We’re talking about war between entities who can erase universes with a thought and whose death throes annihilate significant chunks of the multiverse.

But why is he a guinea pig?Originally, I wanted Cuddles to be a hamster. However, upon look...