Flower Festival

From the Sonic News Network, the Sonic Wiki

Flower Festival is the Team Blast attack used by Team Rose in the game Sonic Heroes. Big bounces Amy and Cream on top of his umbrella with a shower of flowers raining down on the area, destroying all enemies. All three members level up by one and grants them temporary invincibility, high running speed, and a shield afterwards. The invincibility wears off after the gauge resets itself.