So if you didn't figure it out by now, this is the monster in Cheddar Cheese Ceremony's artwork and he's having a good time right now. His card's info says:
My Plump Pony Pal Cheese Sandwich
LIGHT / Plump Pony Pal-Type Ritual / Level 6 / ATK 500 / DEF 2450
You can Ritual Summon this card with "Cheddar Cheese Ceremony". Once per turn, if a Level 5 or higher "My Plump Pony Pal" monster would be destroyed, it is not destroyed. You must control "My Plump Pony Pal Pinkie Pie" to activate and to resolve this effect.
Super Rare