Glad to hear that the issue has been resolved, @deliriousfan606, and it’s great to hear that your grumpig and feebas are doing well together now! Not to mention, of course, that it’s quite wonderful to hear that your grumpig actually cares for his teammate so much that he would go to such lengths to protect her from a literally toxic environment.
(Of course, it’s also worrying that the environment in Alola can be so volatile that a rainbow-colored muk can be mistaken for a river, but I suppose that’s neither here nor there.)
In any case, it is quite fascinating to know that pokémon are so much more aware of our shared environment than we are. Your grumpig seems incredibly loyal and wise, so may he continue to give you trustworthy advice from here onwards.