Biff

Biff is the leader of the Neptunes who plays the lead guitar and stars in the Jabberjaw animated television series. He is voiced by Tommy Cook.

Character description
An athletic, handsome, brown-haired young man who is the band's guitar player and level-headed leader who books all the gigs. In many episodes, his hair is drawn black. His main catchphrase is "Jumpin' jellyfish!" (occasionally, "Hoppin' halibut!")

Harvey Birdman
Biff and the Neptunes appeared in the episode "Shoyu Weenie", in which, after the Chan Clan discovers that Jabberjaw and the Neptunes have stolen their hit single and decide to take their case to a higher power. When he's not available, they settle for Harvey.

Scooby-Doo! Mystery Incorporated
Biff and the Neptunes appeared in the episode "Mystery Solvers State Club Finals".

SCOOB!
Biff and the Neptunes appear on a poster in the Funland amusement Park Arcade.

Jellystone!
Biff is set to appear in the upcoming HBO Max original series Jellystone!, alongside Jabberjaw and the Neptunes.