Box Slimes are, as their name suggests, box-shaped Slimes and are of a reddish hue. This box-like form supposedly results from a Slime being stuck in a box for a long period of time. Despite this distinct shape, they are still as gelatinous and stretchy as their normal Slime counterparts. When breeding, any given Slime as the pedigree with a Material monster will typically result with the egg of a Box Slime.