If it's the HBC ratio issue, you have few choices:
- run HBC -> launches in 4:3 -> Run
Ratio fixer homebrew -> back to HBC in 16:9 -> Launch your homebrew
- Install the
HBC forwarder from Joostin -> run the forwarder -> reloads HBC in 16:9 -> Launch your homebrew
- Install a
forwarder for your homebrew which its TitleID doesn't start with E, F, J, L, M, N, P, Q and maybe X. (USBLoaderGX forwarder should be fine, it's starting with "U")
edit 2017 : install HBC v1.3 open source version, it has a fix included. though, some homebrew might not work correctly anymore (return to HBC could be an issue)
If it's not the HBC ratio issue, it might be a real USBLoaderGX issue (as reported by other users).
Force aspect ratio setting doesn't work correctly with some games (especially on vWii?)
I think it works fine with Wiiflow, you might want to use wiiflow to launch these problematic games.