Not that these are sreious but they are fun to think about...

GIR

Nuetral B: Throw Pigs. If the opponet has an item the item will be switched with a pig.

Side B: Extending claw. Claw extends real quick and can hurt bad.

Up B: Rocket Mode! Gir powers up and rockets into the sky!

Down B: Self Destruct. Head explodes. Can be charged.

Final Smash: RIDE PIGGY, RIDE! Gir rides a Pig across the stage.

Spongebob:

Nuetral B: Toss Krabby Patties

Side B: Spins Spatula like Pit.

Up B: Ride Jellie fish for split second.

Down B: Karate Block. Counters attack with Karate.

Final Smash: Goofy Goober Attack. Spongebob becames Goofy goober rocker and sends waves in desired direction.

Rabbid:

Nuetral B: Throws a plunger. Occasionally causes the opponet to trip.

Side B: Sausage Whack. Just pounds opponet.

Up B: Rides a firework. Explodes after a little.

Down B: Plays music. Limited range.

Final Smash: Rain of plungers. A few giant plungers fall from the sky.

Thats it. If you have any post a comment of them. This all may seem so childish but I really just did it out of boredom. lol