Sorcerer on the Rocks(1999)

Chivas 1-2-3

Ruthless sorcerer Chivas Scotch is hired by a count named Cuttlefish to destroy an evil monster attacking a nearby village. But things go awry when Chivas fails to destroy the monster and he's forced to transfer his spirit in the body of his beautiful servant Gin Fizz.

(Source: Anime News Network)