Captain Toad

Captain Toad is a playable character in Super Mario Scralaxy.

Super Mario Scralaxy
Captain Toad appears first as an NPC in The Mushroom Festival. After beating that stage, he is unlocked.

When playing as him, pressing down causes him to do a double-jump while his special gives him 15 free coins.

He does not actually jump -- he uses a portable springboard, causing his jump height to be random.