When you get 150 star you go outside with luigi and go to the cannon, then go on top of the castle and get the rabbit
Collect all 120 stars and go to the cannon outside. If you are playing super Mario 64 ds get all 150 stars and go to the cannon outside.
Get all 150 stars
The cannon is opened outside the castle, shoot to the roof there is three 1-ups, luigis rabbit, and a wing cap
Waluigi isn't in that game. The cannon in the castle grounds is unlocked with 150 stars.
Although there are 150 stars in total, you only need 80 stars (and Mario) to complete the game as this is the number of stars you need to get into the final Bowser level.
There's 150 power stars in Super Mario 64 DS.
Collect all 120 stars and go to the cannon outside. If you are playing super Mario 64 ds get all 150 stars and go to the cannon outside.
For a walkthrough go here: http://www.cheatcc.com/ds/sg/super_mario_64_ds.txt
You must collect all 150 stars, then it will automatically open.
There are only 120 stars in super Mario 64.
There is a total of 150 stars on Super Mario 64 DS.
There are really 151 Stars, but only 150 are counted.
Collect all of the stars. 120 for the Nintendo 64 version; 150 for the Nintendo DS remake.
You can't get 1000 stars you can only get 150 stars.
There are only 150!
Get all 150 stars
any number of stars with luigi or all 150 stars