>>46271499On top of what Anon mentioned, it seems that whatever power is inside the mural attached to it is actively malevolent and is waiting for the chance to overwhelm Yamask and take over
So, an injured and weakened Yamask is a golden opportunity, and probably is why Galatians Yamask are 'crying' harder than Unovan ones, who evolve into a cool gold and trespasser eating coffin. Meanwhile Galarians are either kicked out in best case scenario, or overwhelmed and subsumed
That or Yamask just knows how to become a slick looking ghost inside a heap of clay, nothing concrete