It's all colorful behind her in honor of the now long past 25th MLP anniversary and her gradient body and shiny hair are also for that. Here's her card's info:
My Little Pony Pretty Pop
LIGHT/25th Birthday Pony/Level 4/ATK1600/DEF1200
This face-up card gains 500 ATK for every other face-up 25th Birthday Pony-Type monster you control. Once per turn, you can negate the activation of a Spell Card that targets this face-up card and destroy it. Each time this card inflicts battle damage to your opponent, your opponent draws 1 card.
Common