I've been doing a couple of runs of No OoB and I just don't see myself improving anywhere every run. So what would be the best way to practice this game?

You COULD practice on emulator, although it will feel different going from practicing on emulator to running on console. Another way, is if you have a softmodded Wii (meaning Homebrew channel is installed), you can get an app called GCMM, which can import a save from somewhere else, like a save that was uploaded online (providing your memory card is 3rd party, i.e. Madcatz). The save files that you will probably need is located under the Resources tab on this board. You will need either a USB thumbdrive or SD card in order to do anything with softmodding though.

Thanks for the reply! I'll most likely practice on emu but softmodded wii would probably be something to consider.

Actually, GCMM works on all memory cards, even first party. I know this because I have 2 1st party memory cards (1for US games, and the other for JP and PAL games)