I'm having a similar problem with 99.8%. I have all 250 gold bricks but only 114/115 character. The thing is when I pull up the grid I don't see any ?? or black spots so I can't tell who I'm missing. There's no icon left on the map either. I didn't use any cheat code to unlock character, so I'm not sure what the problem is. Help please? Or am I screwed and have to replay the darn thing? I really don't want to since the air races still give me nightmares haha.