I know that the M.D.P. is in the trash bag, the Enhancer is right next to the area with the ogre, and the Strengthener is in the hut with the slime girl, but I don't know where the last one could be in the forest, which should be the Mentalitiser.
Moving them would make it more fun. Though in my case it would give me a better chance at finding it since I somehow cannot get to it for the life of me.
I went to the top left of everything I could think of, whether it be the forest, the sewers, the castle, the town, even the other continent, but I can't see it.