No Removal Gym was orphaned when it first printed, and while you could have it in a deck, it wouldn't do anything because Energy Removals had been rotated out at the time.
Dark Crobat from Neo Destiny didn't have a Dark Golbat to evolve from and was unplayable until Pokemon Breeder was...
Apparently Legacy Energy reduces your opponent's claimed Prize Cards by one, once per game, which it has to specify because otherwise you could cycle it over and over
You sound mad, anyway I'm disappointed we didn't get a Hasufel card after the debacle that was casting him as a brown horse in the LOTR movies. Not sure who this guy is
Also Fairy Types, come on, two psychic type in the same trio, bad.
gotta say I'm glad they didn't decide to just have "Ogerpon" without a mask in its name so we could get non-ex versions of the cool masks