Luvdisc instantly looksl ike such a silly fish - its pink coloration, heart-shape, and...does it actually have lips?! Why would a fish have lips? For kissing or someth...oh. The kissing gourami even ACTUALLY kiss (sorta) - they lock "lips" to spar with one another.
Mudkip seems like a weird animal - one too many fins, goofy eyes, and things just sprouting out of its cheeks for no reason? That's because it's based on the axolotl - or possibly a mudpuppy, but let's stick with axolotl, since it's a way cooler word and JUST LOOK AT THAT PICTURE.
DO NOT LET THAT FISH GET TO LEVEL 20, DUDE.