It works specifically well in decks with Polymorph, which can get it into play early on
There was a thread a few months back for the Pok-Emotions game with a focus on Sleepy linked here which would likely give you a starting point, but I would imagine it is not all inclusive to every card with a sleeping Pokemon
The Vermin takes advantage of the rats dying in combat or to bargains while providing three power on turn 2, while the Trainee gives a 2 powered first striker on turn two, or that plus a couple of rats if you send it on an adventure first
1st Edition English cards first appeared with the very first Pokmon TCG set, Base Set , and ended with Neo Destiny , while 1st Edition Japanese cards first appeared with the Pokmon VS expansion (no English equivalent) and ended with the Expansion Pack 20th Anniversary set (the English equivalent being Evolutions )
Magic: The Gathering, Unlimited, contains 302 cards