Players of Pokémon Scarlet and Violet can receive a Mew from August 8th, 2023 to Monday, September 18th, 2023, at 14:59 UTC by using the Mystery Gift Password: GETY0URMEW.

Add Your Very Own Mew to Your Team!

Receive a Mew via Mystery Gift in your Pokémon Scarlet or Pokémon Violet game.

Categorized as the New Species Pokémon, Mew is a Mythical Pokémon that can learn any move and is said to possess the genetic codes of all Pokémon. Each Trainer’s Mew will arrive with a different Tera Type, Nature, and move set. These differences mean your Mew is truly a Mew of your very own!

Use the hashtag #MyveryownMew to share your special Mew with the rest of the world, then enjoy your adventures together as you travel across the Paldea region, throughout the land of Kitakami, and into Blueberry Academy. How to Receive Mew

You can receive Mew in your Pokémon Scarlet or Pokémon Violet game by entering the password GETY0URMEW via Mystery Gift.

Mystery Gift Password: GETY0URMEW

Password Expiration Date: Monday, 18 September 2023, at 14:59 UTC

Notes:

• You need to connect your Nintendo Switch system to the internet to claim this gift.​
• To connect to the internet, your user profile must be linked to a Nintendo Account. (This does not require a paid Nintendo Switch Online membership.)
• This password can be used only once per save data.​
• It takes approximately 1 to 1.5 hours of play time before you are able to access the Mystery Gift feature.

Source: https://sv-news.pokemon.co.jp/en/page/118.html