what does EX stand for or do in a Pokemon card?
>The ex in the name stands for extra, as indicated by a wide range of attacks that have some sort of additional effect on Pokémon-ex. For example, in the EX Deoxys expansion, there is a Grumpig which possesses an attack called "Extra Ball", which deals additional damage if used against a Pokémon-ex.
Pokémon-ex (TCG)
