1) M. Gengar can Will-O-Wisp Alolan Muk. But Muk can take a hit from Sludge Bomb, Shadow Ball and Hex. So it can’t really 1v1.
2) You’re right about Melmetal can be 2HKO while M. Zam doesn’t but be careful because most Melmetal carry earthquake or Double Iron Bash.
3)Almost everyone knows that...