While Fini is stuck waiting for her TF Hoop to be repaired, she's reminded of how vulpix evolves. With this in mind, she realizes that, if she does evolve, her TF Hoop wouldn't recognize her new form and she'd never be able to tf back to normal. Ever. Naturally, she's fairly averse to even being near an evolutionary stone like this one.

I drew that ice stone myself and managed to put more effort into it than Fini lmao