keep trying the GC controller until you reach RM, otherwise, no joy.
Power off the Wii, insert the controller, technically press and hold the D-pad, power on Wii, wait 2 seconds, let go the D-pad.
after successfully getting into RM, you'll see the "4.2x" showing at your lower right hand corner.
don't press both the GC controller and the wiimote when Wii is on health screen (remember: don't date your wife and your lover for a dinner in the same evening.), it just won't work.
it'll ease your unBricking, help reading autoboot_wad_manager, if you can get a DVD drive with wasabi-DX modchip on.