Uses its claw as a gun (A literal pistol shrimp):
Beta Remoraid revealing that it was based on a gun:
Gigantamax Blastoise sporting a comical amount of guns:
Mega Blastoise:
Beta Octillary showing it is based on a tank:
Gigantamax Intellion uses its tail as a snipers roost and has a sniper rifle:
Dragapult is a Stealth Bomber:
Water cannons are not guns
Then why do the cops put them on tanks and shoot them at people?