playing card sleeves 200 Hard Plastic, 3"x 4" Trading Card Holder, Sports Cards Protectors for Top Baseball Game Sports Cards Cases (100 Hard Sleeve + 100 Soft Sleeves) : Toys & Games These sleeves are acid free and will fit into a hard sleeve toploader. Trading Card Sleeves, 2 Pack/100

That said, there are some generally accepted guidelines

Is Charizard leaning in to get a few skritches

It's a natural fit for things like Prime Speaker Vannifar decks and can really be played in any creature-heavy deck (especially one with a lot of silver bullet one-ofs) and provide a decent amount of value

Being able to interfere with your opponent's plays on their turn is a great way to gain an advantage and lock them out of powerful cards

Totodile takes 20 additional damage from Lightning-type attacks

Beyond the mainline games, Slaking's appearance in spin-offs and ancillary media further cements its place in the Pokmon universe