I think playing Pokemon has given me RSI.
Why do you think you have RSI?
My right clicking finger makes a sound that I don't like.
Playing Pokemon is fun, but it shouldn't be done to the point where you have caused RSI. You should stop playing for awhile if it is causing you actual harm.
I've hurt myself so much and I can't stop
The pain should be the reason you stop. This is something you can fix and not allow to get worse.