Mony resembles a small mollusk with round eyes, a yellow/dark orange shell, and a reddish-pink body with at least three visible tentacles.
Mony swims underwater. When Kirby approaches, the enemy uses jet propulsion to either rush toward or away from him. If it runs into Kirby, it damages him but is defeated in the process. The hero can defeat it safely by using Water Gun or a Copy Ability.
Mony's name is derived from the word ammonite, the mollusk upon which the enemy is based.
- In Kirby Mass Attack, what appears to be a frozen Mony is located in the background of Stage 9 of Dedede Resort.