Based on the manga of the same name, this Production I.G.-produced short follows Slikichi & his friends as they venture into the hideout of a casino owner who cheated his way into winning a rare hat pertaining to Slikichi. Will Slikichi be able to win back his rightfully-owned hat?

A short anime directed by Mizuho Nishikubo and produced by Production I.G, which was shown at the V Jump Festival '98. The special is based on the Slime Boukenki manga by Osamu Kaneko.

A short anime directed by Yuasa Masaaki with Production IG, distributed on VHS as a bonus to a video game magazine subscription. The main character is a Slime from the Dragon Quest video games.