Generation 3 · Pokédex profile
Iron Armor Pokémon
Pokédex entry
Its iron horns grow longer a little at a time. They are used to determine the Aggron's age. The gouges in its armor are worn with pride as mementos from battles.
Battle data
Pokédex entry
When Aggron Mega Evolves into Mega Aggron, the destructive ability of its fearsome horns can turn a steel-clad tank into so much scrap metal.
Battle data
Conditional evolutions can require additional game-specific prerequisites beyond the displayed method.
No direct acquisition source is indexed. Evolution or gifts may still provide a path.
Rare grass and Surfing encounters inherit the first native slot's level range. Supplemental fishing follows each rod's native slots. These ranges exclude Lure effects and randomizer replacements; eligibility restrictions still apply.
Data source: configured Grand Anthology Gen 1–9 species, forms and abilities. The website uses frame-cropped copies of the game's existing Pokémon sprites, which remain franchise/artist-owned assets. Some alternate forms use labeled default-form artwork when their individual sprite is unavailable. See acknowledgments for credits.