Pokémon fans rejoice! Shiny Meloetta, Manaphy, and Enamorus are now available in Pokémon Home, though acquiring all three requires a significant commitment. This Pokémon Home promotion incentivizes users to populate their storage service with a substantial number of Pokémon.
How to Get Shiny Manaphy in Pokémon Home

To snag Shiny Manaphy, complete the entire Sinnoh Pokédex in Pokémon Home. This necessitates owning and completing Pokémon Brilliant Diamond or Shining Pearl. After completing the Pokédex in either game, confirm its completion within the Pokémon Home app. A Shiny Manaphy will then be sent to your Nintendo account via Mystery Gift. The Sinnoh Pokédex contains 150 Pokémon, making this a manageable, albeit time-consuming, task. The reward is well worth the effort, as obtaining a Shiny Manaphy outside of this event is exceptionally difficult.
How to Get Shiny Enamorus in Pokémon Home

Securing Shiny Enamorus mirrors the Manaphy process, but requires completing the Hisui Pokédex from Pokémon Legends: Arceus. Once complete, confirm this in Pokémon Home, and the Shiny Enamorus will arrive via Mystery Gift. The Hisui Pokédex boasts 242 Pokémon, a considerably larger undertaking than the Sinnoh Pokédex. However, Legends: Arceus’ open-world nature might make the collection process more enjoyable.
How to Get Shiny Meloetta in Pokémon Home

Shiny Meloetta presents the most significant challenge. You'll need to complete three Pokédexes: Paldea, Kitakami, and Blueberry. This requires Pokémon Scarlet or Violet, along with both DLCs, "The Hidden Treasure of Area Zero," which unlocks the Kitakami and Blueberry Pokédexes. Crucially, Pokémon must be caught directly in Scarlet or Violet; transferring them from other games won't suffice. The Paldea Pokédex contains 400 Pokémon, Kitakami 200, and Blueberry 243. This Shiny Meloetta is exclusively available through this Pokémon Home event.
Thankfully, these giveaways aren't time-limited, allowing players to collect at their own pace. Happy hunting!