Centaurworld is an animated series created by Megan Nicole Dong, about a horse from a world resembling a serious-in-tone action cartoon who is transported to a much more "cartoony" world with whimsical rules.
Fragile Things (S01E02)
Glendale's stomach is briefly swollen after transferring food into her "portal tummy".
What You Need (S01E04)
Glendale's portal tummy visibly expands again when she stores a sentient tree.
Holes: Part 2 (S01E06)
The mole centaur Comfortable Doug briefly inflates before announcing the start of a trial.