Pokemon Center 2018 Rainbow Rocket Campaign Golisopod, Groudon, Kyogre & Friends mini bath towel. This towel was only available at the Japan Pokemon Centers in January, 2018, for a very limited time and in very limited quantity, during the Rainbow Rocket campaign. It is as long as a bath towel, but not as wide, so it is a nice smaller size for drying off. Made of 100% cotton. NOTE: To keep the colors from bleeding, dont leave the towel wet for long periods of time. If you wash it, wash separately, as colors may fade or bleed the first time you wash it.