Jyuken Sentai Gekiranger Lesson 18: Sharkin-Kin! The Body is Strong Season 1 Episode 18 Airdate: June 24, 2007 Synopsis Seeing the failures of his style against Dokariya, Sharkie decides to abandon teaching Jan as he doubts his effectiveness as a Geki Juken master. ← Lesson 17: Goro-Goro! Teacher and Student Love All episodes Lesson 19: Gokin-Gokin! Showdown with Rio →