With Mario Galaxy 2 you should not set the graphics settings too high, your GPU might be struggling with high settings. The internal resolution setting and the anti-aliasing setting(especially the SSAA settings) are the most demanding ones. If the game still stutters with a resonable 3x internal resolution and no anti-aliasing, the issue might be something other than your settings, but posting them wouldn't harm, maybe there's a clue in there.
PS: You mean the forum page for the game won't load? This one?
https://forums.dolphin-emu.org/Thread-wii-super-mario-galaxy-2--25931
PS: You mean the forum page for the game won't load? This one?
https://forums.dolphin-emu.org/Thread-wii-super-mario-galaxy-2--25931