Subject: Re: Kyatto Ninden Teyandee
This game seems to be named a number of different things (Cattou Ninden Teyandee, Ninja Cats, Samurai Pizza Cats ?!, and etc.).
However, looking through my collection, I found an english translation (partial) and a (presumably) complete english translation.
Perhaps you already knew about these and want to make a better translation?
If not, send me an e-mail. [BTW, the translation ROMS I had did not work initially, but correcting the header made them work fine; they are indeed english translations]
Also, it appears to be a Mapper 4 game (Nintendo MMC3 mapper chip) with 128kB of PRG ROM and 128kB of CHR ROM. In theory, all you would need to play this game or its translation on NES hardware is a Mapper 4 game and a couple of 1Mb PROMS, such as a 27C010.
You remove the original PRG and CHR roms, replace them with your [perhaps] socketed and programmed ROMS, make sure mirroring etc is right, the pinouts are right or correct it with some cut traces and jumper wires, and you are in business.
Defeating the lockout chip would not even be necessary since the game you modify will already have a genuine lockout chip.
If the game needs battery backup or something you are more limited, but if not almost any MMC3 game will work, I get them at GameStop/Funcoland here in CA for a few bucks each.
(a list of mapper 4 roms, and a good resouce on devcarts, etc.)