One of the Swords of Justice from Generation 5 returns in The Indigo Disk DLC for Pokémon Scarlet & Violet with a Paradox variant you can find and catch called Iron Boulder. This almost robotic-looking steel bull seems to be a futuristic version of the Unova Legendary Pokémon. Unfortunately, only those with a specific game version can come across this powerful creature.
How To Find (& Catch) Iron Boulder (Pokémon Scarlet & Violet Indigo Disk DLC)
The Legendary Pokémon Iron Boulder is a rare creature you can find and catch in Pokémon Scarlet & Violet's Indigo Disk DLC if you finish a quest.