Aron is a Steel / Rock type Pokémon introduced in Generation 3. 1. Sturdy. 2. Rock Head. The ranges shown on the right are for a level 100 Pokémon. Maximum values are based on a beneficial nature, 252 EVs, 31 IVs; minimum values are based on a hindering nature, 0 EVs, 0 IVs. The effectiveness of each type on Aron. More @Wikipedia
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