In Mega Gardevoir's case, all of its pre-evolved forms, including regular Gardevoir, are present in the background, creating a family portrait-style scene
Attack!" When Luna activates either of that monster's effects, she announces "Dark Sage's effect activates!" When Luna Summons "Dreamsprite", she announces "Dreamsprite!" Most of the time when Luna attacks with that monster, she announces "Attack, my Dreamsprite!" When Luna activates that monster's effect, she announces "Dreamsprite's effect activates!" When Luna Summons "Fairy Archer", she announces "Please aid me, Fairy Archer!" Most of the time when Luna attacks with that monster, she announces "Fairy Archer
The by far best set to open is Celebrations
If this Pokemon has any damage counters on it, this attack does 150 more damage
The card begs the oft-asked question, In the absence of an objective rule structure, do we all become Squee? The most obvious use of the card is to strengthen the waning popularity and power of U/R Storm in Modern (for a good list pre-Faithless Looting, see the list that I cited in my last article)