Assist is a move that appears exclusively in Sonic Colors' multiplayer mode, Eggman's Sonic Simulator. It allows one player to stand by while the other traverses the level on his/her own.
Description
When a player presses the 2/Y button in 2-player mode in the Sonic Simulator, the Virtual Hedgehog/Mii who is controlled by that player turns into an orb. This hovering orb follows the other player, who can now continue alone. Although the player is powerless to control the orb, his/her Virtual Hedgehog or Mii is invulnerable. At any time during the level, the player can revert into Virtual Hedgehog.