Target a keese with the gale boomerang to bring it to Link. Turn into a wolf and use a Dark Energy Attack to target the keese. Wait until it returns to its platform and release the attack to jump up to the platform. Then use a Long Jump Attack to reach the Heart Piece. You want to be standing at the top of the stairs and slightly away from the wall as shown in the video
Alternatively for the Wii, you can use a super jump in place of a long jump to get to the chest.
Simply long jump to the chest.
The fastest way to get the 100R upon entering SPR for the second time is to release the bubble with one throw then kill it while killing the poe with the same B-Charge as shown in the video below
After entering the room on the first floor, roll to the right side in front of the Ice wall.
Target the window across the room, then the top of the pillar slightly to the right and then do the final target far to the right (over the fence).
Jump as soon as the boomerang goes out of bounds both times.
After the leaving the Double LJA room, you can clip through the floor by rolling over the edge towards the cage and use jump slash at the right time (not really precise).
Alternatively you can hop down and use L-Target sidehop on the lower left edge of the cage to clip through the floor. This is a bit slower, but safer and the more common method.
The most recent of way of clipping through the floor was found by SVA.
After regaining control over Link, sidehop and sideroll on the ground. After the sideroll you have a three frame window to make the Jump slash.
Aim towards the ice wall and pull out a bomb and put on the Iron Boots for timing purposes, wait until the 4th flash starts then take off the Iron Boots and hold forward. The bomb boost should cause you to land on top of the wall. Once you reach the upper ledge, aim the Gale Boomerang at the cannon and use a Long Jump to get to the opposite side of the courtyard.
Since the Snowpeak Ruins are accessed at a different point in the Wii any% route as compared to the GameCube any% route, you can still get to the opposite side of the courtyard. Place a bomb a foot or two behind the wall with the cannon behind it. Get on the spinner, and bounce off the wall into the bomb. If done correctly, you should boost onto the wall.
As Wolf Link, get into the corner to the right of the freezard and line up with the wall in front of you. Go into C-up and turn to the left until you get frozen. Break out of the ice, hold forward and press B to attack. If done correctly, you should clip through the door. Once you clip, transform back into Human Link and open the door.
There is now a faster method to skip the Freezard which was found by Paraxade0 and saves about 3,5 seconds. To do it, simply run into the wall on the right of the Freezard and sidehop into it. Break out of the ice and B-Attack between the Freezard and the doorframe.
After performing the bomb boost in All Dungeons you will want to head over to the boss key. To start this you can use a LJA on the very edge to get over to the middle platform by targeting above the door frame.
From the Middle Platform it is possible to LJA onto a broken pillar and then jump over to the platform with the door to the boss key room, this skips having to bring a cannonball and destroying the Freezard. It is possible to get knocked down by the freezard at the end when climbing up, if you think this will happen just wait until his cycle ends then climb up.
It Is possible to get the third poe without killing the mini-freezards, this saves 2s in 100% but is harder.
It is possible to skip the freezard on the 2nd floor in 100%, this is much easier than the normal Freezard Skip
In 100% You can use backslice and moral draw to clear the room quicker than just using Ball & Chain
Using 4 bombarrows the room can be cleared quickly, even faster than the method above that uses backslice and mortal draw.
You can collect the heart container with the ball & chain while it is floating down.
If you get the gainer (1 frame backflip during CS) just hold left and mash ball & chain.
If you didn't get the gainer, hold left and use ball & chain when the cutscene ends.