Monmon

Monmon is a Rookie Level Beast Digimon that looks like a monkey. His original name originates from the Japanese word ko ete, which means small male monkey, and his English name is derived from "monkey". He is known by the original Japanese name, Koemon in Digimon World DS.

Koemon has an over-sized slingshot that he carries around on his back, which he wields with ease despite the size difference.

Digimon Xros Wars (manga)
A Monmon is in Sweets Zone when Taiki, Akari, and Zenjirou are falling.

Digimon World 3
Monmon is a starter Digimon available in the Powerful Pack, along with Agumon and Renamon. If you didn't pick him as a starter you may get him later. He digivolves into Hookmon at level 5. He digivolves into Armormon at level 20. He digivolves into Cannondramon at level 40. Monmon is also available as a Blue Rookie Card with 5/5.

Digimon World DS
Koemon can be seen in a quest.

Digimon World Dawn/Dusk
Monmon is an NPC digimon at the DigiColiseum who provides Access Counter help.

Attacks
 * Swing Swing: Swings his arms around.
 * Banana Slip: Shoots a banana peel with his slingshot.
 * Baby Sling
 * Mischievous Hoop