I'd then go with "Akuma-kun - The Demon World Trap"
Yep, I pretty much hacked the crap out of the game to completion, including the password and all menus.
(I think I basically expanded all three-option dialog menus to display vertically) As well as four-line text boxes. Not an easy task. (as I actually had to rig up a control code to switch between single-line and double-line, the latter pretty much just for the magic charms shop)
The only remaining stuff is probably text editing issues, such as giving good enemy names.
There's still some text, especially battle text, that is going to sound wonky and is probably not easily fixable due to how the game loves to store string fragments.
I had an issue with the game freezing a few times when trying to use a spell on the world map, though I didn't get it after trying several times to try to, so I don't know whether it's been fixed or not.