[Shouri no BIG WAVE!!!] br Athena & Robbikerottsu br [Preview OPV] br release at 2007-11-14 br -- br TV Animation br Kids Variety program br Anime Lobby br "Robby & Kerobby" br Opening theme song br from 2007-10-07 time-limited br -- br *Athena: br 　Risa Niigaki(Morning Musume.) br *Robbikerottsu: br 　Aika Mitsui(Morning Musume.