bolt, when in the air and its vertical speed is near 0, bolts downward (more downward thrust with more hits) while increasing its jump height.
speed's adventure
bolt unlocks after defeating adjustable once. The difference from speed is it behaves the same as bolt in the base game, but holding the jump key after jumping makes it jump higher. The bolting behavior is off in the chase level, however, and the jump height is the same as if it was on.