Like most Pokmon cards, the value of Aggron depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Mysterious Treasures)
Its also worth noting that authenticity plays a significant role in a cards value
I dont quite think this is a bomb -- the ability is certainly nice, but not game breaking most of the time -- still, it is a very good card
Its Crimson Storm attack is devastating, dealing 200 damage and knocking out any Pokmon in one hit
Eventually of course all this madness had to be stopped, so when the Extended format was created they made sure to put this on the banned list
+ Until end of turn, target creature gains "Whenever this creature deals combat damage to a player, draw two cards." Instant Color tag templates(None) Warriors' Lesson Until end of turn, up to two target creatures you control each gain "Whenever this creature deals combat damage to a player, draw a card." Instant Color tag templates(None) Instant (CTRL to add secondary) Sorcery Qty: 6 Price: $10.26 Audience with Trostani Create a 0/1 green Plant creature token, then draw cards equal to the number of differently named creature tokens you control
