what is double sleeving cards bad? : r/PokemonTCG have accessory for every fan of the franchise What's the deal with double

This Means any Black Star and Silver Star located on the bottom of the Pokmon Trading Card

the lowest of any of the gen 1 Pokemon by quite some margin

Manually override chosen card printings, if you dislike the printing choices made in the deck list When importing a deck list that contains excluded printings (see below), MTGProxyPrinter tries to replace them with suitable surrogates, where possible Supports double-faced cards and split cards Both front and back are searchable by all names printed on the card When a double-faced card is added, the program automatically adds the same number of copies of the other face (can be disabled) Generate check cards for double-faced cards by right-clicking the front or back side

It will negate any Monster effect, which in Duel Links is especially powerful since that's how most combos start