Monkey Dude

The Monkey Dude is a badnik created by the evil genius Dr. Robotnik, made to spy on the scientist's foes via it's integrated spying camera. It lurks itself around trees often to do so.

Sonic Mania Plus
Whilst not appearing in the original game, he does in the extension and appears in Angel Island Zone. The badnik would climb up and down trees, throwing various coconuts at the player.

Sonic And Tails
Making his only appearance in this episode, Robotnik is defeaten by his nemesis and said hero's friend. He gets a notice from his device he owns, which views an echidna carrying a mighty emerald in his arms. It is in fact a Monkey Dude spying on Knuckles from a distance, hanging on a palm tree. The doctor jumps in exhilaration, yet not knowing how he'd cross the emerald. However, he sees Tails' plane standing next to him, which Robotnik uses to take flight in so he can snatch the emerald located in the island.

Appearance
The Monkey Dude have a blue body overall, overlapped with a grey neck and a black-colored face. It also dawns a thin and grey tail and a beak-like mouth on his face, which has black dotted pupils in one eye above the beak. The eye next to it is (as it appears in the only episode) a spy cam. It's arms are four dotted spheres and on his head, it looks like he wears some kind of helmet with a yellow cap. He also has clawed fingers, used to grab on the trees. However, the creation of Robotnik does not confirm to have any legs.

Trivia

 * Monkey Dude does not make many appearances in games nor in other media, only appearing in Sonic 3, Sonic 3 & Knuckles, the series and the Archie comics.