Somehow my mind just came up with some random weapon suggestions.
Donkey Hammer
This is kinda like a hammer only the top of the hammer is the shape of a donkey's head. It acts like a real weaponous hammer. When you hit somebody with it, they shrink to the size of how they would be if an anvil fell on them. Also if they get hit then weapon will play some noise a donkey makes.
Boom Butt
This is a funny weapon. When you activate it, you bend down and guess what you do? You start shooting flying poo balls out of your butt. It should do 10 damage every time you got pelted with one. And if it hits you it should make a PLAT sound. And the poo balls should shoot out like a mini gun for extra laughs.
Refrigerator Shooter
This is a real edible shooter. Its like a mini refigerator about the length of a book and the width of a rectangular cookie jar. You should hold it up with 2 hands facing front. And when you shoot it the refrigerator door automatically opens and shoots out a random set of projectiles (EX: Apple, Banna, Orange, Cookie, Milk, Yogurt, .etc)
Thats all my ideas. :D