A fat pony is being used as Synchro Material for a Synchro Summon. Here's the card's info: Super Overweight Tuning Normal Spell Discard 1 Tuner monster and a number of Synchro Material Monsters until their combined levels equal the level of a Synchro monster in your Extra Deck and Special Summon that Synchro monster from your Extra Deck. The Synchro Summoned monster cannot attack this turn. Rare
