It always irked me that, for an 80s anime series with so much gaming potential, Dirty Pair only got a single game adaption an it sucked.http://www.hardcoregaming101.net/dirty-pair-project-eden/
Ideally, fixing some of that games most egregious issues could make for a more enjoyable experience, though I imagine it would take a lot of effort to hack it:
* Enemies wouldn't re-spawn unless the player transitioned screens.
* Include an in-game map for the maze navigation levels.
* Create cut-scenes that expand upon the game's plot (which it's based off the movie with the same name).
* Make sure that the player can only die after taking a certain amount of hits as opposed to one (maybe six?).
* Ending gets decided not by player shooting accuracy, but by the total number of lives spent (clearing the game with no lives lost shows the best ending).
* In-game graphics could be improved (rocks, enemies, etc.).
In the Dirty Pair inspired game, Layla, all art and player sprites could be modified so that they would resemble Kei and Yuri.http://www.hardcoregaming101.net/layla/
Another idea would be to hack the NES Mega Man games to look like Dirty Pair games:
* Artistically, one could take advantage of the Mega Man's graphic style for them to look like a super deformed take on the series. Could be named Dirty Pair SD or SD Dirty Pair
* Mega Man's sprites could be modified to resemble Kei and Yuri. The player could change characters by pressing Select in the boss selection screen.
* Dr. Light's sprites could be the 3WA scientist from the OVA series (forgot his name) the helps the Lovely Angels with his inventions.
* Roll could be chief Golley, Rush could be Mugi and Beat could be Namo.
* Dr. Wily could be an original villain or a return of Dr. Wattsman from Project Eden.
* Bosses could be modified to look more like human/cyborg criminals rather than actual robots.
* Soundtracks, specially the title and credits music, could become 8-bit renditions of the 80s anime series soundtrack.