Help with Mario Party 7 ??

I know it's for Game Cube but couldn't decide which forum to put it in so I chose this one. I have three problems with this game and I have looked everywhere but can't find anything that answers my questions.

1. I have only one mini game that still has never shown up to play, and I can't figure out how I could finally get that one last game to come up in the list so I can play it, to fix my second problem...

2. I can't get into Bowsers Decathlon Castle in the mini games room because it says I do not have all the mini games unlocked.

3. I have all souvenirs but one, which is the one right in between the cruise ship and the helicopter.... I have played all games in mini game mode that I have and every mode to play it in. I've beaten all the games in solo mode, I've played party cruise a million times as with the deluxe cruise... and I have over 28 thousand mileage points added up now and I've already bought everything in the item shop... so where is this last souvenir hiding and what am I supposed to do with all these friggen mileage points that I can't use???

Any help and answers would be greatly appreciated. These questions have been driving me nuts for months.

This isn't the right place for this. I'll move it to the General Chat section.

Have you tried going to GameFAQs?

Unfortunately I've never played the game myself.