Moving slightly away from doing pure fanart, here's a fan-character, a birdo names Chloe. Chloe is trying to face some of her inadequacies and general shyness, by going to the beach in a bikini. She isn't rotund, or big-boned, or anything like that; she's fat.

Birdo (C) Nintendo

PS: I am well aware that  caution_cat has a birdo character named "Chole"; I was actually quite surprised to see a pic of her a few days ago, shortly after I settled on my character's name.