He's using hacks. He's probably using action replay (ar) codes. With hacks, you can do all
sorts of neat things. You can use this 'moon jump' hack to get to numerous out of bounds
areas and to get to certain areas before you're normally supposed to. You can go through
walls that you normally wouldn't be allowed to do. You can get instantly maxed out on all
items. Including bombs, arrows, all ship parts, all treasures, rupees, etc. You can hack
certain items to get them much earlier than you would normally get them. You can get the
king's key as soon as you start the game. You can get the phantom sword at the start of
the game. You can have infinite time in the temple of the ocean king. You can be
invincible and take numerous hits from the phantoms without taking a single heart of
damage. There's one-hit-kills hacks too! And much more. If you want an action replay
device, you can buy it online or go to a store that sells a lot of video games and video
game accessories, like gamestop or gametrader. Most of these stores sell action replays.
There's currently an action replay for the nintendo ds, nintendo dsi, nintendo wii, and
even for the nintendo 3ds! Each of them come around for roughly $20. It's a great buy if
you want to hack! I hope this helps! :d