I was just wondering about Helping Hand. It increases the power of your partner's move by 50%. So you have two choices:
1. One attack move at 150%.
2. Two attack moves at 100% each.
So are there any situations where HH actually works well?
EDIT: Sorry made a typo, "opponent" was meant to be "partner". I'm well aware HH is for double battles. I'm asking whether it's actually worthwhile in double battles, because you could just attack with both Pokemon.
For example, Psychic+Psychic = 180 damage, but Psychic+Helping Hand = only 135 damage! You wouldn't normally use the same move on two pokemon but you get my point.