Agent Twirp is a red-orange fish with pink lips and pink eyelids. He wears a dark green dress shirt accompanied by a yellow tie. He wears dark green dress pants and dark black dress shoes. His hair is extremely dark, and the back part of his hair is sticking up. He has a pointed, thin, separated mustache on each side of his face. He wears thick black glasses and his teeth appear to be curved at the ends. He seems to be very short.
Plankton called the Bogus Business Bureau to complain that Mr. Krabs would not let him guess how many bun seeds were in a jar for the annual bun seed guessing contest, in which the winner received a free Krabby Patty. Twirp went to the Krusty Krab, demanding that Plankton be allowed to guess or face being shut down. When Mr. Krabs said Plankton's guess of 500,301 was incorrect, he was ordered, by Twirp, to count every last seed to prove it, but it turned out Plankton was right.
Despite standing up for Plankton, he also upheld Mr. Krabs' rules, saying he would allow a show before Plankton received his Krabby Patty, and that Plankton had to eat (and swallow) the Krabby Patty on the premises.