Unlocking Trial Galaxies

In Super Mario Galaxy for the Nintendo Wii, on the observatory between Rosalina and The Garage you will notice an outline of a green launch star. To use this launch star and unlock the Trial Galaxies you must find all three Green Power Stars. I have outlined the locations of the Green Power Stars below, please note that you will have needed to complete Luigi and The Haunted Mansion level in the Kitchen dome before you can start your hunt for the Green Power Stars.

• Kitchen Dome - Buoy Base Galaxy, The Secret of Buoy Base: Use the green underwater pipe to find the secret Green Power Star.
• Fountain Dome - Battlerock Galaxy, Battlerock Barrage: At the end of the level, you will see the regular Gold Power Star, do not collect it. Go underneath it to find Luigi trapped. Get a Bullet Bill to follow you to Luigi to break open his cage and collect the secret Green Power Star.
• Bedroom Dome - Dusty Dune Galaxy, Blasting Through the Sand: After the 1st Red Spiky battle, use the launch star and go underneath where you land. Feed the Hungry Luma the required Star Bits to reveal a secret Launch Star that takes you to the Green Power Star.

After finding all three Green Power Stars, return to the outline of the Green Launch Star on the Observatory. You will notice three Green Lumas hanging out around it, talk to them and they will transform and activate the launch star. Congratulations, you have unlocked the Trial Galaxies. Trial Galaxies Unlocked:

• Rolling Gizmo Galaxy
• Bubble Blast Galaxy
• Loopdee Swoop Galaxy

Super Mario Galaxy

Unlike the traditional side-scrolling Mario games, Super Mario Galaxy for the Nintendo Wii is 3D. Instead of having a flat area map to choose which level to play next, you have a 3D space station with observatory's that hold levels. The space station is not used only for selecting your next level, but you can run around and find 1-up mushrooms.

10 Free 1up's (Location: Space Station)

• Get 5 from the Mail Toad
• Get 1 in the crate at the Garage
• Get 1 from underneath the Gate dome
• Get 1 from underneath the stairs of the Kitchen dome
• Get 1 from the center, lower spinning platform
• Get 1 from the top of the station (requires Red Star)

Starting boost when racing Cosmic Mario

• When the countdown starts, hold forward, then as the countdown hits 2, hold down on Z to crouch. When the race starts, hit A and you will turn yellow for a few seconds and get a really good boost that will put you ahead of Cosmic Mario.

Unlock Luigi

• Collect all 120 stars and fight Bowser after speaking to Rosalina on the Comet Observatory. Wait for the credits to end and you'll see a message saying Luigi is now playable. Note: Luigi jumps further, runs faster and doesn't stop as easily as Mario.