Frypolar

Frypolar is a spirit of ice and fire, constantly shifting between the two states, which serves as mini-boss of the Sword & Shield Maze in Oracle of Seasons.

By hitting the spirit while it is in its' fire state with Mystery Seeds, Frypolar reverts to its ice state. Link can then pummel it with Ember Seeds, repeating the process until defeating it completely. While in its fire state, Frypolar can summon rings of flames to harass enemies, and when in ice form, the spirit is capable of summoning icicles out of the ground to impale foes. Link could also defeat him in his fire form by shooting his ice form's ice crystals with Mystery Seeds, then hitting Frypolar with Mystery Seeds. The young hero could then use his Power Bracelet to pick up an ice crystal and throw it at Frypolar.

Trivia
Twinrova is the only other enemy that has two different forms with two completely different powers.
 * Frypolar's name is a play on the word "bipolar," a reference to its dual elemental nature. "Fry" relates to fire, and "polar" relates to ice.
 * Likewise, its Japanese name,, is a portmanteau of and
 * Frypolar is one of the few monsters that only appear in one general game that has two forms.
 * Coincidentally, the powers used are both fire and ice.