The Gooey Bomb (チューインボム, Chūin Bomu, Chewy Bomb) is an item introduced in Super Smash Bros. Brawl.
It takes on the appearance of a glowing orange sphere in a blob of goo. When thrown, it can stick to anything, even characters. Eventually it starts flashing, then explodes (after 6 seconds), damaging anyone who gets hit with 22%. However, if it sticks to a character, they can pass it to others by running past them, making it sort of like a hot potato game. The blast can still be avoided by dodging with good timing. Kirby, King Dedede and Wario can use their Inhale and Chomp moves to eat Gooey Bombs, but this will damage them. Kirby can also defend himself from a stuck Gooey Bomb by using the invincibility of his Stone move. It is possible to start a chain reaction of explosions when two or more Gooey Bombs are attached to one character.
CPU fighters will often enter a random sequence of shielding and dodging if a Gooey Bomb has been attached to them, rather than attempting to move the bomb onto someone else. They can be commonly seen shielding repeatedly.
A bomb encased in a blob of goo. This material is highly adhesive, so you can throw it at and stick it to opponents. Once it's attached to someone, this nefarious device will explode after a set amount of time. Be wary, though--if you come into contact with the character carrying the bomb, it may stick to you. This truly is a high-risk item.