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HM12 (Generation II glitch item)
HM12 (hex:FE) is a glitch item in Pokémon Gold, Silver and Crystal. It is found in the items pocket, is useless and can only be sold for 19660 Pokédollars.
The description of this glitch item is "Attacks 5 turns with rising power." in both Pokémon Gold and Silver and in Pokémon Crystal.