Here's an idea that came up after playing stage 7 in Voremon.

Zearo wanders around in his charizard form and when he encountered a delibird he gave a deal, all the sweet poffins he could eat for being a meal. The purple dragon agreed and happily gobbled as much as he could before being guided into the tail sack. Zearo blissfully ate away at the treats as the bird dragged the enormous sack to a hitmonchan who already ate something as he burps loudly "Hey, what's in the sack?" He asked as he pats his gut a few times. The bird smiled as he held it loosely "Oh this is the main course~"