Its ability to learn a wide array of moves, combined with the Huge Power ability, which doubles its Attack stat, makes it a formidable opponent in both single-player campaigns and competitive multiplayer battles
Of course, as an Ace Spec card, it allows players to also switch out their own Active Pokmon to the Bench, which can totally change the complexion of a game, making for a pretty attractive card to include in a deck
RR and ER cards go even further, showcasing parallel art versions illustrated by Hasbros original artists in dazzling, vibrant colorssignificantly enhancing both the visual appeal and collectible value of the cards
The counter gain seems minuscule at +2/+2 but if you are running a lot of Spirits and Arcanes its basically a free effect
To avoid fuelling Animate Dead strategies (hi again, Animate Dead), discarded cards got exiled