Amusing! Exciting Dungeon was a video game released 3 years previous. While it had a very successful launch, the punishing difficulty of its early game caused its popularity to plummet, and its servers shut down after three months. This action left the [[Ropuremon ()|Ropuremon]] for the game depressed, especially after the other Ropuremon gave his game as an example of failure. In his depression, he is eventually infected with the L-Virus and turns Tokyo into a giant RPG, eventually recreating the game within an AR-Field centered at Fujimizaka Middle School. Haru Shinkai and [[Gatchmon ()|Gatchmon]] use a walkthrough to reach the end, which angers Ropuremon. When Haru tells him that he honestly enjoyed the dungeon crawl, thus praising the game itself, Ropuremon is pacified. The Character I