mega evolution half booster box Pokemon – Bescards embrace the overflowing power of Mega Gardevoir ex Pokemon TCG: Mega Evolution -

Their owner doesn't get to know what they are while they're in exile until you play them

Team up with N's Zoroark ex, lono's Bellibolt ex, Lillie's Clefairy ex, Hop's Zacian ex, and more Trainer's Pokmon, and discover the unstoppable power of friendship in the Pokmon TCG: Scarlet & Violet-Journey Together expansion

And its still amazing

Xyz Monsters usually require their controller to detach (send to the Graveyard) the Xyz Materials to use their own effects, but they may have additional Xyz Materials attached to them with other card effects

That being said, the two cards are at a similar power level and are often found in the same deck