Update: This update is now live! We’ve also got Nintendo’s official patch notes, courtesy of its support page:

Pokémon Scarlet & Violet: Ver. 3.0.0 (Released December 13, 2023)

Release of The Hidden Treasure of Area Zero Part 2: The Indigo Disk for Pokémon Scarlet or Pokémon Violet
Trainers who have purchased The Hidden Treasure of Area Zero will now be able to enjoy adventures in Part 2: The Indigo Disk.

Additional Pokémon
For Trainers who have not purchased The Hidden Treasure of Area Zero, additional Pokémon may appear via local or online communication modes.

Feature Adjustments
-The difficulty of the Ogre Oustin’ minigame has been adjusted.

Bug Fixes
-We have fixed a bug that resulted in the Hospitality Ability causing unintended behavior in certain situations.
-The effects of the Protosynthesis and Quark Drive Abilities will no longer occur while the Neutralizing Gas Ability is in effect.
-Other select bug fixes have been implemented.

Original article: Ahead of the launch of the second DLC for Pokémon Scarlet & Violet, Serebii.net has shared an outline of what to expect from Version 3.0.0, which is apparently due to release shortly.

The highlights include “difficulty for Ogre Oustin” being adjusted and the move ‘Hospitality’, which could glitch out, now has a bug fix. Apart from this, there are a handful of changes elsewhere, but we’ll update you in full when the English patch notes are officially released on Nintendo’s support page.

“Ahead of its release shortly, we have details on the Pokémon Scarlet & Violet 3.0.1 patch notes containing the details of what they have changed
– First returning Pokémon are added for all players to use
– The difficulty for Ogre Oustin’ will be adjusted
– The move Hospitality has a bug fix where it causes unintended behaviour in some circumstances
– Protosynthesis and Quark Drive will no longer activate when in play with Neutralising Gas
– Other Bug Fixes will also run. This patch is required for online play”

Although the game update is free, to play the new Indigo Disk DLC content for Scarlet and Violet you will need to have purchased The Hidden Treasure of Area Zero DLC first.