简介：ThemoviestartswiththeSazer-Xplayingbasketball.Allofasuddenaflashoflightningstrikestheearth.Theyheadedforit,anddiscoveredaboy.TheboywasRiki,whoassumedtoforgeteverything.Ontheotherhand,RemyinformstheSazer-Xthatagiantmonster,'MechaGiantBeastBulgario',hadapproachedtheEarthandweredestroyingbuildings.TheSazer-Xdefeatedthemonsteranyway.Butthensomethingflashedintotheireyes,TakutohadmistakenitasaCosmoCapsule.Itwas,infact,aBosquitoexistedinsideBulgario,whichwaslaterexplainedbyProfessorHoriguchi.…