Shadow the Hedgehog

Shadow the Hedgehog (シャドウ・ザ・ヘッジホッグ, Shadou za Hejjihoggu) is a character from the Sonic the Hedgehog series who, like Knuckles, has a bit of a rivalry with Sonic. He is known as the "Ultimate Lifeform".

In Super Smash Bros. Brawl
Shadow appears as an Assist Trophy and uses his Chaos Control ability to slow down time temporarily (similar to the Clock item).