Buck Rockgut

Special Agent Buck Rockgut is a Rockhopper penguin from the Madagascar World and one of the greatest penguin commanders of America, being over 47 years old, and had been known to bring down The Red Squirrel, Penguin Enemy #1, but he escaped, and waited in an underground bunker for 47 years for him to return, growing mentally insane in the process, until he would be found by Skipper, Kowalski, Rico, and Private as they were digging an escape tunnel, and thus they agree to help him find the Red Squirrel, but Private is concerned as he ends up accusing their zoo friends as Red Squirrel agents for stupid reasons, and decides to trick him into believing he captured him. When the ruse fails, the other penguins discover and start to agree that Buck is insane, and send him to a mission in a made-up place called 'Grrfurjiclestan', driving him off while the four would label the Red Squirrel as make-believe, until a later episode. Another episode later, Buck becomes a sleeper agent that serves the Red Squirrel and drives the four insane, and though they initially believe he wanted revenge for being sent on a wild goose chase, they stop the Red Squirrel by posing as Red Squirrel and confusing him out of his control. After apologizing, Buck intends for them to seek out White Widow the Albino Spider Monkey, Penguin Enemy #2, but Private sends him off by saying she's in 'Newfakeplacesberg', and has never been heard of since. He is revealed to be related to Rocko in The Pebble and the Penguin in a Spyro and Friends Moisode, and was considered the black sheep of the family for wishing to fly while most of the family would take up military careers.

Role in the series
Buck makes his first debut in the Chronicles Episode Going Commando, where he is angered that he has been sent off to another wild goose-chase and comically forces the penguins and their Lodger friends to help find White Widow, as they are stressed out to the point where even Phil calls it a little extreme, yet discover they have no choice when White Widow herself shows up, seeking revenge on humans for destroying her Amazon home, and has a campaign against penguins because, even though she hypocritically claims her actions are for the benefit of all animal kind, she hates penguins because their resistance is making it hard for her to even choose how to view them. Thus, Rockgut has to lead the Lodgers into stopping her from using a poison tailored for humans.