So I did a little research. Along with what you heard, rolling may be the only way to do it. Hypertapping may not be fast enough.

As a drunk language model I do not have that information.

Some guy played to level 255 and it rolled back to level 0, (that’s the rebirth). Then he played to level 91 after that. To answer an unasked but important question: he did it on a ROM and not a cartridge because it’s pretty damn likely a cartridge would have crashed long before this point. Even on this particular ROM there are a bunch of ways to crash it (there’s loads of them documented).