Typical Bundles are still available for purchase with the release of Duskmourn, but Nightmare Bundles provide some extra stuff at an extra cost
Eirdus front side gives all creatures spells convoke, letting you go wide and keep tapping your creatures to play even more
Its a pure nostalgia play aimed at tapping into the brains of people who first got into the Pokmon trading card game as kids when it started, have probably since fallen off, and now have nieces, nephews, or kids of their own, and enough disposable income to be willing to spend money to relive their childhood glory days, or at least get back that beloved foil card they lost, traded away, or had stolen back in the 90s
Magic The Gathering doesn't necessarily seem like a game made for crossovers at first
That being said, the Amber and Emerald deck isnt bad per se