>>11965503First form could be a typical Pistol Shrimp, with perhaps light blues and whites. It learns mostly special attacks in this form
Second form could be something perhaps looking a bit like Crawdaunt. A bigger, more menacing Pistol Shrimp. If it changes typing in this to add the fighting type, it's Pistol claw could be extremely sharp. It starts learning more physical moves in this form, since it has more bulk. Perhaps it learns a specialty move as well, involving it's claw. Something that has a high Base Power, but requires a turn of rest afterwards, since it would need to ready it's claw after it snaps it closed with such crazy force.
Final evolution is some gnarly looking brother, with seaweed hanging off of it, it's shell is dented and cracked from constant battles, and it's large claw is now so large that is is dragged on the ground instead of being held up.
I don't have a definitive design in mind. I just know most people like the idea of Pistol Shrimp being a pokemon.
Sorry if it's a piss poor definition.
