Super Mario Galaxy 2

Super Mario Galaxy 2 is a platforming video game developed by Nintendo for the Wii. It was first announced at E3 2009, and is the sequel to Super Mario Galaxy. It was released in North America on May 23, 2010. The game's levels are galaxies filled with minor planets and worlds. While its gameplay is based on that of its predecessor, the game was updated with gravity effects and new power-ups. It is the fourth original 3D platformer in the Mario series, after Super Mario 64, Super Mario Sunshine, and Super Mario Galaxy.

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

Wiimote Lag When Collecting Starbits
Wiimote slows down when collecting starbits. To fix this, go to Dolphin Wiimote Configuration Window and disable (untick) 'Enable Speaker Data' and this will mute the wiimote speaker, fixing the starbit slowdown problem. Seems like it might be something to do with the wiimote not having enough bluetooth bandwith to recieve the sounds and transmit controls at the same time.

No Support for Operand Size 2
The error above pops up when you try to run the Japanese version of the game. To fix this, set the "System language" option to "Japanese" under the Wii tab in Config.

Music Cuts Out
Background music cuts out after a few minutes of play, as a consequence, it appears that the end credits of the game do not play, making it impossible to create a cleared gamesave. Use the DSP LLE plug-in to correct this. Fixed by

Freeze After Grand Star Levels
Upon finishing a grand star level, the screen may go black, preventing you from saving or continuing. There are two known solutions 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.)