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.

Wii Remote Lag When Collecting Starbits
Wii Remote slows down when collecting starbits. To fix this, go to Dolphin Wii Remote 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.

Japanese and Korean Version Hangs
With the Japanese and Korean versions, Dolphin pops up several error messages and then become stuck. This is due to region checking built into the game that will result in the game crashing if an "invalid" language setting is used (i.e. NTSC-J copy with language set to "English"). Use a language setting that is valid for you game's version to fix this ("Japanese" for SB4J or "Korean" for SB4K).

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

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.)