An old Wii with GC ports then? If possible run a syscheck and post it in a spoiler. I assume you already looked up the games you're testing in the compatibility list to see if they're supposed to work. And you're using a compatible controller, with HID enabled on the app settings, right? Also you should be using 1:1 ripped isos to play as Adeka suggested.
If all of that is said and done, then i'll just stick with my previous conclusion: your wii isn't compatible, and if it has Hollywood v0x21 in your syscheck then it would be yet another hint to that being the cause.
i ran syscheck and I have Hollywood v0x21 T.T i never thought i see the day that happened
this blows