WiiMotes have rumble as well you know
As it happens the Disc version of this game does support GC controllers but not sure how you would do that in dolphin
How are you disconnecting the Wii Motes??
I would hazard a guess that just taking the batteries out isn't going to cut it so the emulator needs to be told that the Wii Mote is no longer connected as it will still be connected to the driver even if the driver is not running anything
Lots of Wii games don't require you to disconnect a wii mote for GC pads to work you just set the game itself up to use them while others like Resident Evil 4 and this game need to the Wii mote to be disconnected after the game starts
It may be that the WiiWare version does not support GC pads though, but the built in manual should tell you that
EDIT the WiiWare version also does have GC pad support as well as Classic controller
P.S. still don't get why you emulate this system
