I am sure there exist 2 versions of Navi (The fairy from Zelda, Ocarina of Time), one yellow and one purple and I am certain I have them both, but I can't find them in my wardrobe. Does anyone know the name or layer they are in?

The items you're looking for are the Swamp Sprite and Forest Sprite, originally from the Scarred Tree Stump costume trunk. :)

Thanks!

I must have looked past them several times, but got them now. :D

My pleasure, happy to help! And happy you managed to find them in the depths of the wardrobe haha.