That really is a good idea. If you are known to have saved a lot of Mudokons, the rest of them could be really happy to see you and visa-versa.
Or how about if you smack a angry Mudokon they come after you and try to kill you?
And I've thought it would be funny to have the sad mudokons try to kill themselves in different ways (I admit, that sounds a bit strange
) such as walking into a mine or off a cliff. Y'know more slapstick. It would be a bit of a change to the guy whacking himself to death.