This were ideas that I used for Kirby in my recent Sonic and Kirby Crossover. These forms are inspierd by ChronoWeapon's Kirby RPG story which I came up with my own ones.
Thor Kirby: A combind ability with Spark and Hammer or Plasma and Hammer. Kirby wilds a iorn made hammer which he can use as a weapon with strong force to take out foes and can create shock wave of electricity which gives spark damage. His most powerful attack is Thor Hammer when charged up by a strike of lighting before giving in a mighty hammer swing at a foe or can be use to hit and fire an object like a baseball bat or golf club.
Cold-Wind Kirby: A combind ability with Ice and Tornado or Freeze and Tornado. Kirby can create tornados or cyclons like in his Tornado Form, but fused with ice makes the winds really cold; it can freeze foes in solid ice if hit or cought in.
Kirby by Nintendo and HAL Lab