From Bulbapedia, the community-driven Pokémon encyclopedia.
A fateful encounter (Japanese: うんめいてき であい destined meeting) is a flag attached to certain event Pokémon and some event-exclusive wild legendary Pokémon that indicates they were met in a special manner. In Generation III, "fateful encounter" was listed as the encounter location; in Generation IV and on, "fateful encounter" is in the text describing the method of encounter.
However, "fateful encounter" does not always appear in the text of Pokémon with this flag set in Generations III and IV. In Generation III, this flag is set for any Mew and Deoxys received from events, as well as the Deoxys caught on Birth Island and the Mew caught on Faraway Island. Moreover, any Pokémon obtained in Pokémon XD will have this special flag set; without it, it is impossible for these Pokémon to obey the player in Generation III, even if he or she has obtained all Badges. In Pokémon Platinum, the Shaymin caught in the Flower Paradise will be met in a fateful encounter; while only obtainable using glitches, the Shaymin caught in Flower Paradise in Pokémon Diamond and Pearl will not be met in a fateful encounter, so cannot be used to obtain the Gracidea.
In Generation IV, the presence of this flag, from Pokémon Platinum onward, allows for special events to happen if the Pokémon with the "fateful encounter" flag is in the party.
List of in-game events activated by fateful encounter Pokémon
- It was once believed that a fateful encounter flag was needed to be set on a Jirachi in order to activate the Night Sky's Edge Pokéwalker route; indeed, events where such Jirachi were distributed advertised such an unlockable. However, it was later discovered that all Jirachi are capable of unlocking the route even without the fateful encounter flag.