First Moon Skip

First Moon Skip, often abbreviated as FMS, is a speedrun technique that involves skipping Our First Power Moon in the Cascade Kingdom and proceeding directly to the boss fight. First Moon Skip saves around 26 seconds if performed optimally, since the cutscenes associated with the first Power Moon are quite long.

This trick can only be used on version 1.0.0, since the game was later patched to prevent the boss fight from triggering until Our First Power Moon is collected. However, since version 1.3.0 is now the fastest version, this trick has been made obsolete as runners on the newest version are now forced to collect the first moon.

After performing this trick, collecting Our First Power Moon will crash the game.

Explanation

Before collecting Our First Power Moon, the bridge across the waterfall is in the upright position, meaning Mario cannot traverse past the moon normally. Although it appears that it would be relatively simple to skip the first Power Moon by simply climbing onto the wall where the bridge would land, there is actually an invisible barrier surrounding this wall that attempts to prevent progression by blocking access to the area past the bridge.

It is possible to bypass this invisible wall in multiple ways, in order to make one's way up to the boss fight. However, the boss fight will only trigger if one is playing on version 1.0.0 of the game, making the trick useless for modern speedruns that utilize version 1.3.0. If one uses this trick in a speedrun, they must collect an additional moon after the boss fight to replace Our First Power Moon.

It is a common misconception that the invisible wall can only be bypassed on version 1.0.0, but it can in fact be bypassed on any version; however, it is only useful for progression on version 1.0.0 since that is the only version in which the boss fight will trigger. It is to be noted that the invisible wall has different collision properties on versions 1.0.1 onward, and it requires a different type of jump to be bypassed than on version 1.0.0.

Methods

Rock FMS

Rock FMS was the first method of First Moon Skip to be discovered. It is widely considered the more difficult of the two and saves less time, so it is rarely still used. As the name implies, Rock FMS involves performing a vault from the top of the rock containing Our First Power Moon. This trick is inconsistent for most runners since the rock has unpredictable collision properties, making it difficult to line up the vault.

Video of Rock FMS

Wet FMS

File:Super Mario Odyssey - NEW First Moon Skip (Wet FMS) - Advanced Strategy Tutorial

Wet FMS is an easier and more optimal method to skip the first moon. To perform wet FMS

• Enter the water to the left of the first moon

• Go near the opposite side of the water where the platform of the chest moon and the back wall meet

• Throw cappy and do a return jump

• Bounce on cappy to get behind an invisible wall near the corner

• Walljump off the backwall

• Dive onto the platform above

Other uses

FMS can be used to softlock the game by activating the 'On Top of the Big Stump' checkpoint, obtaining the first moon using the intentional method and then warping to the 'On Top of the Big Stump' checkpoint. This softlock was previously used in softlock% before it was replaced by a softlock in cap kingdom. This softlock can be done on versions post 1.0.0