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Deals damage. Has a 10% chance to freeze the target. Has a 10% chance to flinch the target.
Ice Fang has an exceedingly low Base Power, and is usually outclassed by Ice Punch. Pokemon that cannot learn Ice Punch may use this move for coverage, the best example being Gliscor.
Ice Punch is a more powerful option.
Icicle Crash is a more powerful option with less accuracy.