When Kirby has the fireworks ability, rapidly tap the B Button to increase the puffball's pyrotechnics and aerobatics.”
— Description • Nintendo Power
Fireworks is a combo ability from Kirby 64: The Crystal Shards. Kirby gets this ability when he combines Burning with Bomb. With this, he leaps up into the sky and creates a dazzling array of colorful fireworks around him. He can combo the ability by hitting the button again, doing up to three attacks, each larger than the last, and each of which sends him a bit into the air. However, he won't be able to float again until he lands if he uses it the 3rd time. In Kirby: Right Back at Ya!, Fire Kirby, coincidentally, is shown to shoot fireworks from his mouth after inhaling some of Sasuke's fireworks. Kirby only uses this firework-based attack in one episode. Cappy New Year
Kirby explodes in a colorful burst of fireworks and launches himself in the air. This attack can be done up to 3 consecutive times, each one being larger and launching Kirby higher than the last.
Kirby leaps into the air and spits out exploding fireworks in all directions.”