Black White and Red all over
Ok I really don't know what happened but I finished the puzzle with ho-oh on it. ( You know where all the unknowns are?!) Well I was walking around and I have know clue what I did but my game restarted and everything was black and white. And your character was outlined in red. I thought Celebi appeared but I don't think so. Believe me!!! Unfortunatly it doesn't last. My game froze and it never came back.
If you need more help, we've got more Pokemon Gold cheats and also check out all of the answers for this game