Bellossom is a type of Pokemon that comes out of a Poke Ball in Super Smash Bros. Brawl. It is a quite common character that comes out of a Poke Ball. When Bellossom is released from a Poke Ball, it first says its name and begins its attack, called Sweet Scent. Circular rays will appear around Bellossom, as shown in the picture to the right. Any character, besides the summoner, who comes in contact with Bellossom during this point will fall asleep. Unless attacked, the characters caught in Bellossom's attack will remain asleep until shortly after Bellossom disappears. Because characters fall asleep when they come in contact with Bellossom, this attack gives the summoner a decent amount of time to use strong attacks, smash attacks or even a Final Smash on the asleep, unaware opponents. Bellossom's attack also causes minor damage if opponents are put to sleep the moment Bellossom uses its attack. Bellossom's attack is very similar to its Sleep Powder from Super Smash Bros. Melee, for both attacks are known for putting opponents to sleep. However, Bellossom remains on the stage for a very long time in Melee, while in Brawl it isn't as long. However, as compared to other Pokemon, Bellossom still remains on stage for a decent amount of time. Bellossom also has its own Trophy in Super Smash Bros. Brawl.
Bellossom's Trophy in SSBB
A Flower Pokemon. After spells of cloudy weather, Bellossom will gather together to call out the sun by performing a dance. When exposed long enough to the sun, the leaves on its body will spin around. A Bellossom's Speed is also known to increase with sun exposure. Its main specialty is Grass-type attacks. Also, Bellossom will close its flowers when asleep.
Bellossom uses Sweet Scent on a custom stage (a stage built using Stage Builder), putting Ness and Lucas asleep. Aren't they cute like that?!
In the actual Pokemon series, Sweet Scent is a move that reduces opponents' evasiveness and does not put the opponent to sleep. With that being said, Sweet Scent in SSBB is most likely based on Bellossom's Sleep Powder or Grass Whistle, which are similar attacks to what it (Bellossom) does in Brawl.