I did notice puppet had several body part equipment slots, so there would be.Deep in woodrot forest, there's a hidden laboratory with slime and drone tfs. You can let your party members be transformed into faceless drones. They won't be able to use normal equipment, but they have their own items that alter their stats and some alter their appearances.
Unfortunately, I don't know any other transformations with equipment like that. Turning a party member into a bimbo and equipping the cocksucking lips doesn't make their lips bigger, which is a darn shame.
Also, cow tf where?