Mega Man Battle Network Chrono X

Mega Man Battle Network Chrono X is a fan-made fictional storyline within the Mega Man Battle Network universe that takes place in 1 AE (After Expo, essentially meaning "after the ending of Battle Network 6"). It is part of the fan-made EXE Forever After timeline that bridges the gap between Battle Network and Mega Man Star Force.

Its website can be found here: Mega Man Battle Network Chrono X