Super Mario Galaxy 2: how to unlock Green Stars and The Perfect Run
Exact Wii unlock requirements for 120 Green Stars, Grandmaster Galaxy, Banktoad and the final 242nd star.
Original 2010 Wii release. Star totals and Banktoad instructions here follow Wii; the 2025 Nintendo Switch edition changes the final Star Bit requirement to Star Bits on hand.
Unlock the Green Star challenge
Collect the first 120 regular stars, then defeat Bowser again in Bowser’s Galaxy Generator. The ending introduces the Green Star challenge and 120 additional stars become available. Simply seeing the credits once is insufficient. If a star is bronze because Cosmic Guide completed the mission, clear that mission yourself to earn its normal star.
Search beyond the normal finish
Choose a Green Star mission from the galaxy screen. These stars often sit above, below or beside the normal route, so inspect unusual ledges and listen for the nearby star sound. A difficult jump may require keeping a power-up longer than usual. Collecting a Green Star ends that visit; plan a fresh entry for another.
Reach Grandmaster Galaxy at 240 stars
All 120 regular stars and all 120 Green Stars unlock Grandmaster Galaxy in World S. Its first mission, The Ultimate Test, gives star 241. Collect the galaxy’s Comet Medal during that run. Practice the Yoshi grapples and changing platforms as separate obstacles so one mistake does not become a rushed attempt through everything afterward.
Open The Perfect Run on Wii
After The Ultimate Test, the final comet requires its Comet Medal and 9,999 Star Bits deposited with Banktoad. This guide covers Wii: the Switch release checks Star Bits on hand instead. The Perfect Run removes checkpoints and allows only one health point. Completing it awards the 242nd star and brings Rosalina to Starship Mario.
Deposit spare Star Bits throughout the adventure so the last unlock is not delayed by a large collection grind.
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