The hookshot in Majora's Mask 3D gains weird properties once it's used while first person glitch is active. By targeting while in first person glitch you can use the hookshot without deactivating the glitch (going into first person or getting hurt/knockback deactivates first person glitch). The hookshot gains the new property of being able to constantly extend from it's original position. Meaning you can fire the hookshot at a wall and then fire it again and it will use the last position of the hookshot (hitting the wall) and add another hookshot chain distance to that; meaning it goes through the wall! But that's not all, a fully detailed explanation of this glitch can be found by clicking Here. It is currently unknown why this glitch doesn't work in some places in an area.
The current, easiest, unbuffered method of getting First Person Glitch is the Bomb Crouch Method. To learn how to perform this method and all the other methods to get First Person Glitch, click anywhere on this line.
Extended Hookshot is very useful in both Woodfall and Inverted Stone Tower Temple, as it skips getting the Boss Key. In Inverted Stone Tower it skips fighting Gomess, a miniboss that can be annoying to fight without any sword upgrade or proper items.
Extended Hookshot now gives the possibility of skipping getting the Goron Mask entirely in Any%.