Not sure about save files, but you can use Gecko cheats in order to practice. I know Phil recommends this all the time.

https://docs.google.com/spreadsheets/d/1tQap13ogF8RnzQI-AAn5fZ75P9ZHhsuAy1z3GEUqtiM/pubhtml

If my pasting of the link doesn't work (I'm on mobile) you can find it under the Resources tab to the left.

[quote=SirQuitsALot]https://docs.google.com/spreadsheets/d/1tQap13ogF8RnzQI-AAn5fZ75P9ZHhsuAy1z3GEUqtiM/pubhtml [/quote]

The spreadsheet has instructions on setting up the cheats. It also has generic Wii VC save files on it as well in the downloads section for both English and Japanese.