Three and a quarter years after the end of the fifth series, a new sixth series was confirmed by Bandai for the Digimon anime, its official name of the series revealed in the June issue of Shueisha's V Jump magazine being Digimon Xros Wars. It began airing in Japan on TV Asahi from July 6, 2010 onwards. Reverting to the design style of the first four series as well as the plot taking on the younger, lighter tone present in series one, two and four throughout the story. The story follows a boy named Mikey Kudō (Taiki Kudo in Japan) who, along with his friends, ends up in the Digital World where they meet Shoutmon and his Digimon friends. Wielding a digivice known as a Fusion Loader (Xros Loader in Japan), Mikey is able to combine multiple Digimon onto one to enhance his power, Shoutmon being the usual core of the combination, using a technique known as 'DigiFuse' (Digi-Xros in Japan). Forming Team Fusion Fighters (Team Xros Heart in Japan), Mikey, Shoutmon and their friends travel through the Digital World to liberate it from the evil Bagra Army, led by Bagramon(Lord Bagra in English), and Midnight, a shady group led by AxeKnightmon with Nene as a figurehead before joining the Fusion Fighters. The Fusion Fighters also finds themselves at odds with Blue Flare, led by Christopher Aonuma (Kiriha Anouma in Japan). The second arc of Xros Wars was subtitled The Evil Death Generals and the Seven Kingdoms. It saw the main cast reshuffled with a new wardrobe while Angie (Akari in Japan) and Jeremy (Zenjiro in Japan) stay behind in the Human World; thus making Mikey, Christopher and Nene the lead protagonists as they set off to face the Seven Death Generals of the Bagra Army and AxeKnightmon's new pawn: Nene's brother Ewan (Yuu in Japan). A new evolution known as Super Digivolution was introduced at the end of the first arc. The English dub of the series began airing on Nickelodeon on September 7, 2013, which is produced by Saban Brands.
Is there an answer to this question (If it cannot be answered, say "unanswerable"): Who did the Fusion fighters find themselves in battle with?
Blue Flare