10th anniversary pokemon cards Counterattack Mewtwo [10th](Diamond Pearl "Movie Premium Seats") Lightning Rarity Pokémon 10th Anniversary - Bulbapedia,

ISBN 9782807616011

It is frail, attacks for cheap, and even has free Retreat Cost

Sure, there are deeper cuts that were left out for whatever reasons the designers might have had, that could be said about every years releases

They dont have reach so they cant block fliers, most of them dont have power so they dont block tokens well, and all of them are small enough that theyll die to almost any combat trick if they block almost any creature, or theyre not big enough to live through blocking most of the larger creatures in the format

This deck doesnt specifically aim to go wide

For example, if Death-Greeter's Champion enters the battlefield and its controller chooses a Grizzly Bears as the target creature, the Grizzly Bears gets one +1/+1 counter put on it as the ability resolves and it gains double strike, but it doesn't gain dash