My coin master “Raider” pig has turned gray in my slot machine. He’s pink and normal everywhere..

If I understand your question correctly...it is because they will change every time you move to a new village. Idk when that started but I, myself, had just realized within the last few month ;) The whole slot machine and everything on it will match with whichever village you happen to be on.

I hope that'll help u

~fellow CM player