Halloween Plushies are little Pokémon statues with special Halloween textures that you can place in your claim. Simply right-click the plushie where you want to place it. To pick it up again, just right-click it while crouching.
This will give you 6 Halloween Plushie Vouchers to use in the Haunted Fairgrounds at /warp Halloween
Plushies in the box are randomized. You can see all possible options by left-clicking the box.
Too many plushies in a single area can be laggy, please limit the amount of plushies within visible distance to under 150. If you have more than that, you can split them up in multiple locations, as long as there's a few chunks of distance between them.