I found the way.
1. Get USA WBFS of WiiParty
2. Get DiiParty files for RiiVolution
3. Use RiiVolutionBuilder to make WBFS with a mod
3. Once it's done, put the file on the root of your USB/SD
4. Use WiiFlow WFL (USB Loader GX has problem with reading it for whatever reason), go to home in it...