Flamemon Knight fight back is the 2nd episode in Super Digimon Xros Wars
During the evening a small fire is going on as Flamemon gets tons of fire wood, then Flamemon runs into Dorulumon. When Flamemon, Patamon, Gatomon, CeCe and Maria get back only to find Ian has left. Meanwhile with Ian who is trying to find a way home and keep his promise. But runs into MegaDigmon, when he attacks Flamemon arrives just in time to protect Ian. Ian tells everyone he needs to keep a promise, and that he will help the Digimon and keep his promise then a Orochimon appears and MegaDigmon absorbers him, Ian gets worried then Ian somehow gets the armor Digi-Eggs to reload out of the X-Loader, and Patamon and Gatomon armor digivolve, Flamemon then tells Ian that he wants to find the king, save the digital world and be Ian's best friend. Ian who is then inspired Digi-Xroses Flamemon, Pegasusmon and Nefertimon. Then MegaDigmon (Orochi Mode) says "Digi-Xros, who are you?" The new Digimon says "You want to know, then I'll tell you, I am "Flamemon Knight" man this is cool!". Flamemon Knight then wins his battle. Flamemon Knight then turns back into Flamemon, Pegasusmon and Nefertimon and then Pegasusmon and Nefertimon turn back into Patamon and Gatomon. Patamon then says they should be an army. Everyone says yes.
(Numbers indicate order of appearance. Bolded characters are fought by the protagonist(s), and italicized characters feature non-explicitly, e.g. voice, silhouette, image.)