Token copies of your own creatures are particularly strong, especially if they're non-legendary copies
Only a small handful of Pokemon namely Vileplume, Hypno, Frosmoth, and Wigglytuff ex are capable of inducing Sleep and all of those Pokemon are either Stage 1 or Stage 2s
(You can always play Special Guests cards and cards from The List in any format where they are already legal, such as Pioneer, Modern, or Commander.) Cards from The List are direct reprints featuring existing artwork and treatments (with the addition of a small Planeswalker symbol in the lower-left corner of the card), but Special Guests cards are reimagined in the style and aesthetics of the setechoing Ravnica's guilds and citizens with new borderless artwork
Pokmon TCG , like other Trading Card Games, offers players the freedom to build their decks however they please, but there's no ignoring that cards like the Greninja Ex may be earning a spot in everyone's deck very soon
The deck used is a deck containing normal dark attribute undead monsters
There are plenty of offshoots and alternate versions, including Pauper Commander if your budget is tight