4 mana for this effect is way too little in any reasonable format
High firepower for a DD in the main deck The effect is not so strong as to be prioritized, although there is no problem with bumping the target's resistance
Each one will be numbered with their number out of 500, and they'll only be available in Collector Boosters
When a card like these has been reprinted in a Standard-legal set, like Switch below, it is reasonably safe to assume that previous prints of the card are also legal again in the Standard format
I can see taking a couple of them out for some main deck Countersqualls, but every time I want to make this change, I bounce a Broodmate Dragon token or something, make Garruk look bad, and Into the Roil sticks
After receiving your Pokemon Happy Meal, look for the small, sealed packet containing the Booster Pack