I agree, that was one of Darkrai's best moves. However, the fact he is legendary is enough to consider him quite powerful.
Bisharp reminded me of the Spanish Knights. Named him Espada in every game. It was perfect that Grimsley had Bisharp, from the way the pokemon looks as if it could kill. Sadly, it didn't have that high of special defense or special attack[most of it is focused on its attack]
Maybe a new Topic?
Best Dark Type Move?