Xenoblade 2 heroine 'Homura & Hikari' participates as a new fighter in 'Super Smash Bros. Smash Bros. SPECIAL', and the main character Rex remains in Mii fighter costume. - GIGAZINE
Rex from Xenoblade Chronicles 2.. has become a Mii Costume in Super Smash Bros. Ultimate. - YouTube
Rex Shulk [Super Smash Bros. (Wii U)] [Mods]
REX FROM XENOBLADE IS A MII OUTFIT "THEY DID REX DIRTY" 【SUPER SMASH BROS ULTIMATE】 - YouTube
Super Smash Bros. Ultimate' Version 11.0 - Patch Notes
Xenoblade 2's Rex Could Be The Next DLC Fighter If This Super Smash Bros. Ultimate Theory Is Right – NintendoSoup
Rex from Xenoblade Chronicles 2 still made it to Super Smash Bros. Ultimate, and Mii Fighter costumes from Monster Hunter and Ghosts 'n Goblins now available as new DLC | Pokémon Blog
Rex Drives into Battle! (...As Pyra's Final Smash!!) | Smashboards
Pyra / Mythra in Super Smash Bros. Ultimate - VitalThrills.com
Nintendo customer support site mentions Mii Fighter costume as Smash Bros. Ultimate DLC
Characters like Rex from Xenoblade Chronicles 2 couldn't make it into Super Smash Bros. Ultimate's Fighters Pass but might have a chance now
Rex - SmashWiki, the Super Smash Bros. wiki
Mii Maker: How To Create Rex! - YouTube
Smash Bros. Direct: New fighter, new Zelda Mii costume - Zelda Universe