Ballon focuses on inflating Kirby to make him bigger and bouncier. Balloon doesn't have any method of damaging enemies normally, but popping does stun all enemies on screen; it seems to act as a replacement for Kirby's Hover technique, which is not available in this game. Balloon is obtained from the Bloonenemy.
Kirby has a similar form when gathering all of the Sparkling Stars, but this is not the same.
Tap with the stylus
Kirby inflates and rises upward slightly. Kirby now bounces along surfaces.
Tap with the stylus after using Inflate three times.
Kirby explodes and stuns enemies, returning to his Ball form.