You can browse by Pokemon TCG expansions, which are handily organized into various eras so you can flip straight back to Diamond and Pearl, Black and White, or keep up with the more recent Scarlet and Violet releases
The answer, it turns out, is kind of the way that the company is staying afloat at all: Pokmon cards
Effects that last "for as long as that creature has a [kind of] counter on it," such as Aven Mimeomancer's, stop applying to Me, the immortal once it leaves the battlefield
Its a good alternative to the in your face aggro of the mono-red aggro deck then it forces you to play smartly around your key creatures
You can play as many Item cards as you like
Value Boosters are a more budget way to crack packs, containing fewer cards and lower rarity, youre not even guaranteed to pull a rare from them