Brats was a danish (Copenhagen) band formed in 1977 as a punk-band, but later became a more heavy metal-styled band after having split up in 1979 and reformed with new members, which Hank Shermann was the only was the only remaining member of the original line-up. Three of the new members were King Diamond, which came from his band Black Rose and Michael Denner. The band later became what we know as Mercyful Fate today.