Movable Items make up the bulk of the items in a decorated habitat in SuperPoke! Pets. Well over 10,000 items of this type were released during the active development period of the game.
Movable items are the only ones that can be freely moved around, rotated, flopped, and re-sized.
In Habi Makeover, Movable Items files are normally stored in the Inventory/Movable Items folder of the My Habitats folder.