Fans of Mega Man Battle Network have long known of a special Japanese-exclusive game for the WonderSwan Color, Rockman.EXE WS. Unlike the regular games, this one plays out as a platformer, much like the Classic series or, perhaps more appropriately, Mega Man Network Transmission for the GameCube. In addition, it follows the story of the first two seasons of the anime. Now, a group of fans at The Rockman EXE Zone have completed a patch which allows the game to be played with an English translation. Check out their video of it in action, but be warned of spoilers:
It's a shame that this was never released here, due to the handheld's Japan-only nature-- especially since it looks like it might even be more fun than Transmission turned out to be. It even has the Style Changes which the GameCube game lacked due to its placement in the timeline.
If you should happen to have a copy, then perhaps this patch is just what you've been looking for. You can find it here, but you're on your own for getting a copy of the game (and no linking to ROM piracy sites in the comments).
Thanks for the tip, Prof. 9!