i collected all the plushie potions, do they want me to put them in the collection? i don't hope so, in that case i'm going to sell them again xD

Yes, for all those achievements where you need certain plushies/beanbags/stickers, the items need to be in your collection.

thank you would have been too easy hahaha at least i had a snapper with the miracle potion plushie, so this didn't completely kill my bankaccount =D