Use Snacks to Find Legendary Pokémon in the Indigo Disk
With the power of snacks you’ll be able to encounter certain Legendary Pokémon from throughout the series. If you find one, you’ll be able to battle it and add it to your team.
According to the latest article on Pokemon’s website:
In order to encounter these Legendary Pokémon, first talk to Snacksworth at Blueberry Academy. If you’ve met certain conditions, you’ll be able to get snacks from Snacksworth that let you encounter specific Legendary Pokémon back in the Paldea region. Snacksworth will share his extensive knowledge of these Legendary Pokémon with you, as well as tales of his heroic encounters with them. Why not listen to what he has to say?
However, Snacksworth can only be met after completing the main story of The Hidden Treasure of Area Zero Part 2: The Indigo Disk.
In addition to that, you must also complete Blueberry Quests (BBQs) and report back to Snacksworth. BBQs can be undergone in the Terarium at Blueberry Academy.
What do you think about this method for unlocking past Legendary Pokemon? Let us know in the comments.