Frozen is a status ailment that appears in the Paper Mario series.
History
Paper Mario
In Paper Mario, if Mario is Frozen, he will not be able to move for several turns. It is indicated by a very large irregular chunk of ice surrounding Mario. At Shiver Snowfield and at Shiver Mountain, Ice Piranhas can inflict this on Mario.
Paper Mario: The Thousand-Year Door
The status ailment returned in Paper Mario: The Thousand-Year Door and serves much the same purpose, with one key difference. When Mario, his partner, or any enemy's Frozen status expires, that character will take 1 HP of damage when the ice breaks. It is indicated by a hexagonal chunk of ice only as big as the character surrounding him or her. In addition, if any attack that can induce a Burn is used on a Frozen character, it will negate both status ailments.