The Double Rare version, which is the standard look for ex cards, as well as the full art Ultra Rare card
Each Pokmon card has a name, a type, and an amount of Health Points
Keep in mind, both of them provide non-Human tokens
The most important take-away from this is that as of this new ruling, you cannot use the search Stadiums of other types*, and that you should always check your discard pile (and any other public zones) before playing a search card with only a small number of potential targets especially later in a game make sure you could still have an in-format target to find, from the point of view of the game
Otherwise, they work just like normal Item cards.
In general, the rarity of Metallic Pokmon is determined by the following categories: Common