Mote is an odd boss. He starts the battle looking like a few pixels. The more you hit him with physical attacks, the more pixels he gains, up to the point where you can see what he truly looks like. However, the more pixels he gains, the more resistant he is to physical attacks. The best thing to do is use Ryu and Karn (as Puka) for physical attacks. Then have Bleu cast cheap spells on him in order to keep him weak to physical attacks. Lastly, use Nina for healing. If you find Mote is gaining too many pixels, have Nina aid Bleu by either casting spells like "Hold" or by using the E.Key. When Mote enters his second wind, he'll begin casting "Inferno". Nina will be very important here for keeping everyone healed, as Inferno is much more damaging than his regular attacks he uses before his second wind.