Capture Cube

The Capture Cube is a device which allows the user to store monsters, which can then be summoned and made to do battle for them.

History
The first appearance of a Capture Cube was as a bonus item found by Rah'ōxah in In the Lair of the Pear after destroying a wall and tearing down a room in Daryl's lab.

Another Capture Cube later appears in in Leveling Up Part 2: Face Drawff. It is available from the Vending Machine at the Hungry Goat tavern.

Bronson Craster has at least three Capture Cubes, which he uses in Monster Duels to summon three monsters to battle the Ladies Book Club. In the same episode, Slimeless Kyle nicks Rah'ōxah's Capture Cube and uses it to summon Walrein.

Description
The cube is split into two parts, one white and one red, which are fastened together with a metal edge. It has a square-shaped lock, adorned with a red glowing button. The word "Warning" is written on the back, with no additional information of just what said warning is about.

Behind the scenes
The Capture Cube is a pretty obvious reference to the Poké Balls from Pokémon, down to the color scheme.