Rockmon

Rockmon is a rare Digimon that has only appeared in two video games; it appears to be a wire-frame version of Frigimon, although this is unconfirmed. The arguments for include its use of ice attacks in Digimon World, and its battle stances in Digimon Digital Card Battle, which parallel Frigimon's. It is also worth note that when a Rockmon enters battle in DDCB, it has the exact same vocalization as Frigimon.

Digimon World
Rockmon appears as a wild Digimon found in Grey Lord's Mansion and Mount Infinity. It used the Aurora Freeze, Winter Blast, Muscle Charge and Giga Freeze techniques during battle.

Digimon Digital Card Battle
Rockmon is a Champion level Rare card.

Attacks 
 * Guardian Bomb: Gathers energy in its hands to form a huge energy ball which it fires at its opponent.
 * Anti-Digi Beam: Fires a beam of energy from its right hand to its opponent.
 * Gigantic Press: Jumps into the air and performs a moonsault.

Variations / Subspecies
 * Frigimon / Chuchidarumon