The Smoke Ball (ケムリ玉, Smoke Ball) is an item in Super Smash Bros. Brawl and Super Smash Bros. 4. When thrown, the ball emits smoke, which steadily changes color (though it remains grey on the 3DS version). This smoke may obscure the vision of players. If thrown at an opponent, it may attach itself to them and do a small amount of damage. When not attached to a player, the Smoke Ball can be picked up. If thrown upward, a Smoke Ball will bounce very high upon hitting the ground. When a player holds an activated Smoke Ball, it will continue to release smoke until it is released and eventually disappears. The Smoke Ball produces more vision-obscuring smoke in Super Smash Bros. 4.
In Smash 4
Ack! It's hard to see through all the smoke this ball lets off. You can throw this around a stage, obscuring the view, or stick it to opponents and really annoy them. The smoke itself doesn't do any damage, but there's definitely an advantage to concealing the battlefield.
A pesky little item that produces a thick cloud of smoke wherever it's thrown, making it impossible to see properly. You can pick it up and throw it again as often as you like. Try hitting an opponent with it - it might stick to them! The smoke itself is harmless, but it's great for ambushing!