It is not known to evolve into or from any other Pokémon.
Cryogonal resembles a shiny, blue hexagonal snowflake. Its facial expression is frozen, which leaves Cryogonal with a still, aggressive-looking face. Two cracks run through its face, the upper opening contains its eyes and the lower serves as a mouth. It has two glowing eyes and its large mouth contains an extendable chain of ice, which is used for hunting. When its body heat rises it will turn into steam and vanish, but will revert to ice when the body temperature lowers. Cryogonal is born in snow clouds.
A group of Cryogonal appeared in Team Eevee and the Pokémon Rescue Squad!. Several of them were attacking and freezing a dam, leading to Virgil, Davy, and Jeff mounting a rescue mission. It was ultimately discovered that a baby Cryogonal was trapped inside the dam, and once it was reunited with the older ones, they left peacefully.
Cryogonal appears in the 3DS version as an enemy in Smash Run. It uses Ice Beam that either flies straight or curves to follow the target.
NA: This Ice-type Pokémon uses its ice-crystal chains to capture and freeze its prey to -148 degrees. In Smash Run, it drifts through the air and attacks with Ice Beam. The beam comes in two forms: one that fires in a straight line and one that curves to follow the fighters.
PAL: This ice-type Pokémon uses its ice crystal chains to capture and freeze its prey to -100 degrees. In Smash Run, it drifts through the air and attacks fighters using Ice Beam. The attack comes in two forms: it will either fire in one direction, or it'll rotate as it fires. Don't let it hit you or you'll end up frozen solid!
This Pokémon was unavailable prior to Generation V.
Cryogonal's appearance seems to be based on both snowflakes and ice crystals. The ability to trap prey in ice crystals may be a reference to the hrímþursar, Nordic giants who were made of ice, who also have this ability. Because of its back sprite and ability to learn several light-based moves, it may also be based on a glass mirror.
Cryogonal is a combination of the prefix cryo-, from κρύος kruos, Greek for icy cold, and the adjectival form of the suffix -gon, from γωνία gōnia, Greek for angle.
Freegeo may be a combination of freeze or frigid and geometrical.