pokemon sealed base set booster box Prices | This display box contains 36 booster packs Pokemon Base Set 1st Edition

[Opponent's Turn][Once Per Turn] When an opponent's Digimon attacks, gain 1 memory for each of your Digimon with the [Royal Knight] trait

Synchro and Fusion monsters are more specialized - Synchro monsters can be added if you have at least one tuner, and Fusion monsters are only used in specialized decks built around them

Not only can it heal the entire team of Pokemon that's out, but it also has the ability to use any of the attacks that any GX or EX on the bench or in the discard pile

But that isn't impressive in and of itself

Duelist Duel 27: "The Secret Weapon", specifically from the panel showing this monster being Summoned