After translating the menu for the Virtual Console release of Starblade, I was interested to see what other System 22 titles were available on Wii. This led me to Cyber Sled, a dual-stick, arena-based combat sim. Translating the menu was about as simple as it was for Starblade:
I then came upon a problem, however, in that Cyber Sled includes a large amount of Japanese text in-game. I thought I'd investigate the original arcade ROM and compare the differences between the Japanese and World releases, but then discovered that the Japanese game was in English all along:
As such, I have to assume the Wii version in fact added the Japanese. Next step, compare the differences between the original arcade versions and the ROM bundled on Wii ... except that they seem to have very little in common. Perhaps one, the other or both are encrypted? I don't know.
What I do know is that the ROM provided on Wii is (slightly less than) 3MB larger than the original arcade version. At least part of this is a save state: the Wii version launches right into the title screen, skipping the self-tests and such. However, I also began to suspect that some of this extra data might be overlays that drop Japanese text over the actual in-game English. Here's why:
This is roughly the same shot as the above, but this time on the Wii. Note the pathetically half-hearted black backgrounds on the Japanese text, which I've come to assume is there because Namco are literally "covering up" the English text with these Japanese overlays.
Purely as an experiment, I tried lopping off a large chunk from the end of the ROM, which I thought looked like graphics. I did manage to get the save state loading to fail, so the game launched into its usual arcade self-tests, which was kind of cool. It didn't really get me any closer to playing in English, though.
As you may be able to guess from my methods, my hacking ability could be described as amateurish at best. I have no real, practical ideas about how to progress from here. I don't even really have a good reason to believe the overlays I'm looking for are bundled into the ROM; there just doesn't really seem to be anything else big enough to contain them.
I understand this is a pretty niche area, so I'm not expecting any hands-on help, but if anyone has any ideas on how I might find what I'm looking for (or even if my guesswork sounds plausible), they'd be greatly appreciated.