Crystal Jewels S01E39 - Dancing with the Marukas

Some of the Marukas are tired of sharing a room with the others in Marcy's place. Once they've split, the Marukas wanted their own lair. After days of building it, they turned the diamond into a cannon to put in front of the Crystal Brawlers, but Roaracryst once again transforms and pushes the ball back to the Marukas, flying back to their lab. The Marukas try many updates according to their labs and try to make it more stable in order to keep the Crystal Brawlers from destroying their cannon, but the cannon falls on them instead.