Pete is an obese black cat with a cream shaven muzzle, and wears a light brown fur coat, a dark brown bowler hat, white opera gloves, a dark brown shoe on his left leg, and a peg-leg. From Season 4 onward, Pete doesn’t wear a light brown fur coat, instead he wears blue overalls with one suspender and a dark blue patch on his left leg, though he still retains his bowler hat, shoe, and peg leg.
He makes a cameo in Doggone Biscuits as the dogcatcher, however, his muzzle is more gray and doesn't have his peg-leg for an unknown reason.
He also appears in Al Rojo Vivo marking his second appearance with a major role and third appearance overall.
Despite being officially a cat, Pete is sometimes mistaken for a dog (specially a bulldog) due to his size and obesity.
This mistake might be reasonable, because of Pete's original voice actor, Billy Bletcher, who also voiced the Tom and Jerry character, Spyke, who is a bulldog and an antagonist to Tom.
Pete is the oldest recurring Disney character.
Despite having a few appearances, Pete is constantly believed to be the series' main villain since he's Mickey Mouse's arch-enemy and has known him for a long time.
Pete’s physical appearance from Season 1 to Season 3 resembles how he looks in the 1935 cartoon, "Mickey’s Service Station". From Season 4 onward, he resembles how he looks from the "Epic Mickey" video game series.