I don't see any rules against widescreen hack, but it's not the way the game was originally meant to be played, so I could see it being banned.
most of the time (if not always) hacks are banned for the OG game's leaderboard,so it's probably banned.
Oh yeah, obviously. "Widescreen hack" doesn't actually mean hacking the rom, just applying a graphics config option to make the emulator render outside the 4:3 resolution.
lostontheinternet is correct, the widescreen hack isn't allowed for the og leaderboard. Aside from allowing intro skip for category extensions, and some additional codes required for a few categories (nonstop, 1000/500 coins), hacks or codes aren't allowed for leaderboard submissions.
We would like to announce that VC and EMU subcategories are now active on the Stage RTA leaderboards (under "Levels"). Stage RTA involves collecting all the stars in a given stage including the 100 coin star. Timing starts on star select and ends upon collecting the final star. You are allowed to us