He Can't Hit You.
Do a Multiplayer and You be Roy or Marth and the CP. Pikachu or Pichu.
Choose Hyrule Temple and go down as far as you can but don't go onto the little ledge. None or Pikachu's/Pichu's moves can hit you. The Thundershock can when he is on the edge so you need to stand far enough away.
You choose Roy or Marth so you can charge up there "B" move and then when you go down to get you then use you're "B" move and they go flying.