Okay, I know that Metronome Powers up Moves with Repitition, But would that Mean that If I used Double Hit while Holding a Metronome, The 2nd Hit would be powered Up?
The answer is nope, this is what bulbapedia says :
Metronome Boosts power of moves used repeatedly. Each time a move is used consecutively, its power is boosted by 10%, increasing up to a maximum of 100%. Switching or using another move returns the move's power to normal. Swipe moves are counted by the number of turns on which they are used, not the number of hits made.