It's been a full year since the Fusion Fighters United Army vanquished MegaDarknessBagramon, but Digimon have started going wild in the Real World again. The Digimon Hunt has begun!
As Tagiru Akashi is saved by Ren, Ryouma and Airu, they tell him that since he is in the DigiQuartz, he needs a partner Digimon to hunt. They then leave, with Ryouma wanting to see his skills in the near future. Gumdramon comes out and both introduce themselves to each other. As they have a humorous conversation, the Old Clock Shop Man appears, and takes Tagiru back to the real world, after saying that "he heard they were interested in joining".
Tagiru wonders where Gumdramon is, and the Old Clock Shop Man tells him he is still here, but just can't be seen. Tagiru follows the old man, and he holds an X Loader. Tagiru wants it, but the Old Clock Shop Man asks him if he is prepared to do so, as he cannot quit once he has it. The X Loader turns into a crimson red color, and as soon as that happens the Old Clock Shop Man knows that there will be some fierce hunts in the future.
Meanwhile, Mikey Kudo is wondering what is going on. A group of people come to watch, and the window glows and then explodes. A Digimon pops out, and some figures in the broken window move away, and Mikey realizes them from before. Ewan then spots Tagiru, who has spotted the running Digimon. Tagiru takes out his X Loader, which causes some oddities for Mikey and Ewan. Mikey realizes that the X Loader Tagiru is holding is crimson, and realizes what will happen for him. The two pursue Tagiru to the DigiQuartz.
In the DigiQuartz, Tagiru and Gumdramon pursue MetalTyrannomon through the alleys. Although there are some obstacles, Tagiru is able to get through them. As Gumdramon jumps through a large gap, Tagiru, not knowing how wide/deep it is, also jumps and then realizes his mistake. Gumdramon then saves him from falling down the deep chasm. They then catch up to MetalTyrannomon, who is busy eating.
MetalTyrannomon and Gumdramon are fighting, and Gumdramon seems to be winning until he uses Fire Vortex. Tagiru then realizes the mistake and tells Gumdramon to stop, but it is too late. MetalTyrannomon bites Gumdramon's hammer-like tail, and Tagiru narrowly saves him. After a short conversation, Tagiru is able to have Gumdramon evolve into Arresterdramon. Arresterdramon easily defeats MetalTyrannomon, and Tagiru collects the data.
Ewan and Mikey then come out after the fight is over, and Tagiru is shocked when he sees the two also have X Loaders of their own. Shoutmon then talks through Mikey's X Loader, and Gumdramon hides behind Tagiru in panic, as Shoutmon is the Digimon King.
(Numbers indicate order of appearance. Bolded characters are fought by the protagonists, and italicized characters appear only as a voice or silhouette.)
Gumdramon Type: Small Dragon Special Moves Ran-gum Break Jacked Hammer Fire Vortex
Clockmon: "Gumdramon! It's a naughty Small Dragon Digimon that likes to stand out." Old Clock Shop Man: "Its Special Move is "Ran-gum Break". It attacks by waving its tail around." Tagiru: "Alright, DigiXros with Clockmon! DigiXros! GumClockmon! Attack with your powered up pendulum!" Old Clock Shop Man: "That won't hit the enemy."