Super Mario Galaxy

Super Mario Galaxy is a 3D platform game developed and published by Nintendo for the Wii. It is the third 3D platformer in the Mario series, after Super Mario 64 and Super Mario Sunshine. A sequel, Super Mario Galaxy 2, was released in 2010. The game follows the protagonist, Mario, on a quest to rescue Princess Peach from the game's primary antagonist, Bowser. Levels are galaxies filled with minor planets and worlds, while gameplay is updated with gravity effects and new power-ups. Super Mario Galaxy was first shown at E3 2006 and enjoyed a high level of pre-release awareness. The game has been hailed by several gaming websites as one of the best video games of all time.

Volume
Some sound effects/musical notes are louder than normal when using DSP HLE. Use DSP LLE for accurate audio emulation.

Inverted Reflections
Certain materials that reflect Mario have inverted reflections, refer. This issue actually also exists on real hardware, so it's not an emulator bug.

Music Stopping
Music stops after a few minutes when not using the LLE plug-in. A patch discussed on the forums extends play for longer, but doesn't fully correct the issue. DSP HLE Fully Fixed by

Dolphin Hangs Before Credits
Dolphin will hang before the end credits play, refer. It is related to the HLE sound plugin. There are two known solution to this problem. Fixed by
 * Use DSP-LLE (also solves other sound problems, recommended)
 * Disable sound (cannot use Save States, if used the game will freeze upon finishing the level.)