During Series 4 Story 2, 20 people were needed for severe training to fight off the Supreme Dark Army members. 6 were already there, so 14 were needed to go to WuHu Island (those 14 were Normal, Nemesis, Kenta, Sparky, Evan, Ben, Charlie, Sam, Shiki, Metal Normal, Kosei, Kouji, Karot, Novah). The 6 were able to help out, but not without severe damage. They also helped out during Series 4 Story 6, as Wuhu Island was the first Island attacked by the Androids. They are also SSS Wielders. Not only that, they also know Kaioken (can only go up to x3). In fact, so can the 10 mentioned up there.