Mega Aggron is the Mega Evolution of Aggron, a Steel/Rock-type Pokémon. Mega Evolving shifts its typing to Steel and sharply raises its stats for the duration of a battle.
“Long ago, there was a king who wore a helmet meant to resemble the head of an Aggron. He was trying to channel the Pokémon’s strength.”
Mega Evolution debuted in Pokémon X & Y (2013) as a temporary, in-battle transformation. In the Pokémon TCG it appears first as “M” Pokémon-EX cards in the XY era, and again as Mega Aggron ex cards in the Scarlet & Violet "Mega Evolution" era — both of which are among the most chased pulls of their sets.
Chase Season tracks 2 Mega Aggron cards across 1 set, with daily market prices and Chase Index rankings. The most valuable right now is M Aggron-EX from Primal Clash at around $94.93.
Common questions about Mega Aggron, its forms, and its Pokémon TCG cards.