Editing Cloud Sea of Alrest

|caption        = [[File:XenobladeSymbol.svg|50px|class=invert-dark]]<br>Cloud Sea of Alrest as it appears in ''Smash''.

The fighters battle on top of [[Azurda]] (also known as Gramps), serving as the home of [[Rex]] in ''Xenoblade Chronicles 2''. Azurda continuously floats through the skies as other Titans fly by. The entire stage has a gentle sway that slightly changes the altitudes of platforms. There is a single floating platform on the left end of the stage, and Azurda's neck acts as a mild slope on the right side. Occasionally, Gramps will raise and lower his head, which will affect the angle of the slope. He will also turn his head to look at the Titans, which temporarily shrinks the size of the stage. The stage contains indications for when he is about to turn his head, such as his neck shaking, a windmill spinning faster than usual, and the door to Rex's house closing. If there are fighters standing on Azurda's head or hanging from his horn when he turns his head, they will slide inwards rather than fall off. Throughout the battle, Azurda will provide banter and comment on the state of the battle. When the battle starts, Azurda will say "I want to see a good, clean fight. Do you hear?" When a player is down to one stock, Azurda will say "It seems that we will soon have a winner!" Other examples include when a fighter is [[KO|KO'd]], [[Self-destruct|Self-destructs]] and when a Titan appears in the background. He also possesses unique lines for {{SSBU|Pyra}} and {{SSBU|Mythra}} if they are present in the match.

The order the Titans appear is randomly selected at the start of the match; once all six have appeared the cycle repeats in the same order. Additionally, the lighting and color scheme of the background changes as the Titans appear. The World Tree will also occasionally appear in the background.

They can appear either in front, to the side or on top of Rex's house, standing either together in one spot or standing apart in two different spots. However, they will not appear in matches with five or more players.

While this stage is a home stage for {{SSBU|Pyra}}/{{SSBU|Mythra}} and {{SSBU|Shulk}}, the latter can only be present at the beginning of ''Xenoblade Chronicles 2'' during a New Game+, as Rex loses Azurda as a home before encountering Pyra, with Azurda regenerating into a small larval stage for most of the game. Although Azurda regenerates into his adult form at the end of the game, Rex's house on his back no longer exists. Rex's fellow party members cannot be present on Azurda's Titan form at all until the very end of the game, as they do not appear at the start of a New Game+, unlike Pyra/Mythra and other Blades previously unlocked (including Shulk).

*Masahiro Sakurai showed an early version of Cloud Sea of Alrest in a [[YouTube]] video<ref>[https://www.youtube.com/watch?v=wKQ2v9kno9I=206s Odds and Ends of Supervising <nowiki>[Graphics]</nowiki>]</ref> along with several changes made before release:

**Sakurai deemed the sway the stage possesses too extreme initially, and suggested it be toned down.

**At one point, the various windmills on the stage were accidentally moving opposite to the wind.