Pokmon ex cards were first introduced in the TCG set: EX Ruby and Sapphire, and typically had higher Hit Points than other Pokmon, yet gave an extra prize card to the opponent upon their being defeated
Reward cards are granted in tutorials at the beginning of the game on Tuesday, Wednesday, Thursday, Friday, and Saturday
Partial returns or exchange of products from a set item is not acceptable
At Level 7, it has 2600 attack points and 1800 defense points
While you do have to discard for Armix's ability, there are plenty of artifacts that want to be in the graveyard, including ones with unearth, so you can use them from there anyways
Game features are identical as well, including both player-versus-computer and player-versus-player online battles, deck building, card trading, avatar customization, a Pokmon TCG tutorial, and more