There are many kinds of Trainer cards in the Pokemon Trading Card Game to help make your deck versatile at drawing the cards you need and buffing your Pokemon to be even stronger
These are perfect in a deck with delve cards because they fill your graveyard
It means overly dominant cards can be rebalanced (generally recosted, but the effect may be lessened too), and for the first time, digital-only mechanics can be used as wellcards that produce other cards, akin to Hearthstone's Discover mechanic
I certainly dont claim to understand it yet, but I wouldnt be surprised to discover that the right sideboarding involves swapping out blocks of cards for similar types in the sideboard, or perhaps bringing in entirely new types to support some that might be leaving
As long as players can use both of Glaceon ex's moves properly, then they will be able to knock out many powerful cards with relative ease
In some cases, fake Pokmon cards may also appear too rough, too slick, too shiny, and the list goes on