Download Play? You can't.
The game itself. You have to beat the first two courses of Retro and Nitro.
Then again you can buy an action replay and use cheat codes.
There is no need to unlock track in multiplayer mode, if you play local, not online, all the track will be available if every one has a copy of the game in there nintendo DS make sure no one use download play option if they have the game because using download play it will not read that they also have the game.
by getting good times on each track.
You can download it from a torrent here. http://dl.torrentreactor.net/download.php?id=1506750&name=Super+Mario+Galaxy+Original+Soundtrack+Platinum+Version
you have to beat all of his ghots in single race on every track and every vehicle.
You have to get 1st on the 150cc cups. You do not have to win 1st every race in that particular cup. You have to win 1st in the points you have won. There is other characters that you can win from winning 1st in the cups. The Mii, However can be won in any level.
you get stars in every track like me and go very fast
Yes, you can indeed download a track for a doorbell.
Unlock 1 Expert Staff Ghost. The easiest track for this is probably Grumble Volcano due to a massive shortcut at the start of the race.
you need to win ten stars to unlock a zonda and a new track
You have to be a member to unlock your new gag track.
I know how to unlock track two but not track three. I'm not sure if track three is the same time as to unlock track two but I dont know. To unlock track two you must simply, click time trials and try to aim for this time when you finish the whole three laps: 45 seconds. If you get that time or under you will get a trophy for you to put in your nest where ever you like, and also you unlock track two! I hope I helped.
Mario Raceway