He has dark brown circles around his eyes which is apparently a facial mask, like a normal raccoon would usually have. Rigby is a short, brown and grey anthropomorphic raccoon with short, spiky hair. These efforts usually resulted in bigger problems than the ones Rigby was trying to avoid in the first place, along with the occasional near-destruction of the entire park. Rigby became somewhat more responsible and thoughtful to his friends as the series progressed, tending to complain less about work and sometimes even accomplishing difficult tasks, such as taking on Skips' chores in 'Fists of Justice' and cleaning up the park ballroom for Margaret's party in 'TGI Tuesday.' However, he still often caused chaos by taking shortcuts or engaging in irresponsible behavior, such as using a machine to pump up in 'One Pull Up' instead of trusting Eileen's training to get the job done. Rigby never finished high school, as revealed in 'More Smarter', though he resorted to working hard at earning his diploma in 'The Eileen Plan'. Between him and Mordecai, he is the most irresponsible, and he often tries to skip work and disobey Benson's orders. Often, these reactions are characterized by his 'Shark Face' expression, in which he raises both arms above his head, and turns his nose upwards, causing his eyes to appear to move to either side of his head, somewhat resembling a shark and his signature ' STOP TALKING!!!' or ' SHUT UP!!!' whenever somebody tries to correct or lecture him. Due to his somewhat immature nature, Rigby is prone to overly dramatic reactions to the simplest of events. Rigby is afraid of horror movies as seen in 'Ello Gov'nor' but is fine in 'Grave Sights'. He also felt bad for Benson after he said he was going to lose his job. However, Rigby cares about his friends, as he tried to help Pops with his fear of giving speeches, saved Muscle Man from drowning, saved everyone from a pack of evil hot dogs, and got angry at Pops when he was taking wrestling too far and hurting Mordecai. He even changed his name to Trash Boat one time because he thought it would sound cool and edgy. Thus, he can be considered the opposite of Mordecai, who demonstrates far more responsibility and maturity than him (in most conditions).

Rigby is also very arrogant, impulsive, impatient and immature at times, giving him the personality of a child. He becomes frustrated, frightened, confused or sad very easily, making his behavior very predictable.

Rigby can be best described as a 'wild adult', even though he is past his teenage years.

Regular show season 7 episode 37 wiki