You were in Arven's dorm with him, helping your pal test some new sandwiches he made using Herba Mystica

"Man, all this food prep really works up an appetite~" Arven joked, the muscular young man wiping his brow as he took his half of the sandwich. "Well, like they say in Kalos: Bone Appletun!" Arven cheerfully said as he took a bite, savouring the flavours of his newest culinary creation. Little did Arven know, his badly-mangled Kalosian would be the least of his problems...

Not too long after finishing his sandwich, Arven couldn't help but look down at his belly and groan... His usually fit and trim stomach was beginning to grow larger and rounder before his very eyes!

"What the... I knew that Herba Mystica could make things grow, but I didn't think it was like this...!" Arven blurted out as his belly reached the size of a basketball, blowing up to yoga ball size not long after...