I remember people use to offer "pet buttons" that were like tiny transparent background doodles/chibis about 100x100 to 200x200 in size or so each. I can remember people would offer them, sometimes in batches of 5 or something?? Does anyone still make those? 😅

If you want the chibi/doodles than the art market is where you would go. If you already have custom art pets and just want like graphic button with their overlay/name/background than makes those.