This art is a complete redraw of the original card's art and goes into MLP Tales' Starlight's future as a teacher, likely following Ms. Hackney's teachings and of course weighing more than she probably would anticipate. Her card's info says:
My Chubbier Pony Starlight
LIGHT / Chubbier Pony / Level 3 / ATK 300 / DEF 2500
This card cannot be Special Summoned except when you control "Super Weight Gain Formula". If this card is selected as an attack target, the attacking monster loses 1000 ATK during the Damage Step. This face-up card cannot be destroyed by battle. Once per turn, you can put 1 Ice Cream Counter on all face-up "My Chubbier Pony" and "My Chubbiest Pony" monsters you control. Monsters with an Ice Cream Counter(s) gain 200 DEF for each of those counters on them.
Rainbow Rare