cappy from mario odyssey is proof that that’s cap

would a pooltoy yinglet use zh instead of th? would it if it had a permagrin? what if it was a recently transformed person? what if it was a recently transformed yinglet?

A tadpole is both a frog and not a frog; it is not yet a frog, but it is also undeniably inseparable from frogness. This is true regardless of the fact that there are frogs (the Pristimantis) which are never tadpoles; they develop directly into their adult form. Some frogs are born being recognized as frogs, some have to grow a bit first- but they're all frogs.