【Updated: 】
Mushroom: You can cause your opponents to crash by ramming into them while boosted.
Giga Bob-omb: Bounces 2 times.
Bubble: Can float you over walls.
Dash Ring: Tosses out three rings in front of you. Pass through them for a speed boost. You can cause your opponents to crash by ramming into them while boosted.
Boomerang: Will break if it hits a wall.
Bob-omb: Explodes on impact when hitting the ground or a wall.