Hooligans are a Trainer Class introduced in and currently exclusive to Generation V. They're a combination of a Biker and a Roughneck, depicted as gangsters fighting alongside each other. The only Hooligans in Black and White are located on Route 9. They typically use the / -type Pokémon, Scraggy.
|BW Battle Sprite|
Jin and Sub
Bikers and Roughnecks are shown to be hanging with each other in past generations. Generation V introduced the fact that they fight alongside too.