He went face to face with Perfect Cell and didn't die. Yamcha died to a fucking plant man, and then he later got turned into chocolate and eaten by Majin Buu who Mr. Satan had made friends with by giving him a Gameboy set to self destruct.Mr Satan would probably beat Yamcha.
(And we all know Mr. Popo held his power levels back on purpose at that point because if he actually fought he would have destroyed Earth.)