He wears an orange tanktop and glasses. His lips and other parts of his body are darker green. He has a bit of speech impediment and breathes very deeply.
When SpongeBob finds out he forgot to put pickles in Bubble Bass' Krabby Patty in the episode Pickles, he goes into a state of shock, and takes time off of work, claiming he has forgotten how to make Krabby Patties altogether.
However, SpongeBob later achieves his confidence back and resumes his role as fry cook when Bubble Bass returns once again. Again, he orders a Krabby Patty from SpongeBob with pickles, which SpongeBob delivers, only to hear Bubble Bass claim that there are no pickles yet again. However, SpongeBob realizes that Bubble Bass had been hiding the pickles underneath his tongue the entire time, from both Krabby Patties to avoid paying. At the mercy of the angry customers, Bubble Bass escapes for his life, before they can punish him for his deceit. He also had a woman's car keys under his tongue. Bubble Bass makes a minor appearance in F.U.N., where he "accidentally" sits on Plankton, and digs himself deeper into the seat when SpongeBob tells him what he'd done with an evil smile, and later confused Plankton him for a jellybean and chases him about his hand when he starts running. Bubble Bass also made a cameo appearance in Fools in April. He was shown when SpongeBob got tricked by Squidward and ran into his butt and made a large square indent. Though, instead of Bubble Bass being a green color he was brown (Grey). Bubble Bass appears briefly in Plankton's Good Eye, he fell out of a window (his house was burning) and crushed Plankton again. He was also there when SpongeBob gave Plankton the "Great Big Hug".
In the first level SpongeBob and Beautiful Gorgeous travel to Bikini Bottom where they find Bubble Bass eating Krabby Patties right before he gets transformed into a giant minion of the Morphoids. Bubble Bass later heads to the Krusty Krab forcing SpongeBob and Beautiful Gorgeous to follow. They arrive to the Chum Bucket and rescue Gary. Jimmy and Plankton later arrive to the theater to only find Patrick and Squidward trapped. SpongeBob and Traloc later arrive at the Krusty Krab and fight a monstrous-sized Bubble Bass who demands more and more Krabby Patties. Finally he is defeated returning Bikini Bottom normal once more.
Still no pickles! —Bubble Bass to SpongeBob, Pickles
Where are the pickles? —Bubble Bass, Pickles
I'll take a double triple balty deluxe, on a raft, four by four animal style, extra shingles with a shimmy and a squeeze, light axle grease, make it cry, burn it, and let it swim.
—Bubble Bass and Squidward, Pickles
And... there's my ride. —Bubble Bass, Pickles
Help, save me! —Bubble Bass, Plankton's Good Eye
Thanks, buddy! —Bubble Bass, Plankton's Good Eye
I'll save you! —Plankton to Bubble Bass, Plankton's Good Eye
Judging from how Bubble Bass and SpongeBob looked and talked to each other and when Bubble Bass was crushing Plankton (when SpongeBob's friend), it is evident that SpongeBob and Bubble Bass shared something of a rivalry long ago.