Board Thread:Versus Debates/@comment-26998824-20151026220137/@comment-1751565-20151027124241

I say Gengetsu wins. Roshi's Lava Style Can be defeated with Water Style (As shown by Kisame in Anime), but what will make Gengetsu win is either his Stem Imp or his Shadow Style Mirage. Gengetsu also has the Flesh Transforming ability to turn to Water mixed with Oil. Using Roshi's heat to power up his Oil would also give him an advantage.