List of serial code event Pokémon distributions in Generation VIII

This is a reverse-chronological list of event Pokémon distributions that were given away via serial codes to Pokémon games in Generation VIII.

Unlike serial codes in Pokémon Sun, Moon, Ultra Sun, and Ultra Moon, serial code events in these games are region-free and can be used regardless of the game or console's region or language, provided the player is connected to the internet and uses a legitimate serial code. An active subscription to Nintendo Switch Online is not required to claim Mystery Gifts on Nintendo Switch games.

Pokémon Center Birthday Pokémon
These Pikachu and Eevee were distributed via serial code to players of Pokémon Sword and Shield at stores and Pokémon Stores in Japan from November 15, 2019, if they visited during the month of their birthday, but only if they provided proof of their date of birth and Nintendo Switch.

Poké Ball Plus Mew
Initally released with Pokémon: Let's Go, Pikachu! and Let's Go, Eevee!, the Poké Ball Plus comes programmed with an internal serial code to redeem this that is compatible with Pokémon Sword and Shield. Despite being marketed as the Poké Ball Plus "containing" Mew, the serial code aspect means that to claim, the player must connect to the Internet through Mystery Gifts.

The serial code aspect also means that it is impossible for a single manufactured Poké Ball Plus to redeem more than one Mew, even if the Poké Ball Plus is later resold. Players that purchased multiple Poké Ball Pluses can redeem one Mew for each.