Legendary Pokémon are special Pokémon which always have an impact on the story in PTD 1 and 2. They are always rare/one-of-a-kind and usually reside in their own shelter. They have been seen by so few that they are considered legendary. You'll meet most of them in the story:
SPOILER ALERTS
- Articuno: First appears in Mt. Moon 2 (Catchable in Seafoam Island)
- Zapdos: First appears in Mt. Moon 2 (Catchable in Power Plant)
- Moltres: First appears in Mt. Moon 2 (Catchable in Victory Road)
- Mewtwo: First appears in Pewter Gym (Catchable in Unknown Dungeon)
- Mewthree: First appears in Cerulean Gym 2 (Uncatchable, which Mewthree is a Shiny Mewtwo, Shiny Mewtwo can be captured in Unknown Dungeon at a very slim chance, or you can pay 5 SnD Coins for one Shiny)
- Celebi: First appears in Celadon Gym (Uncatchable) But in PTD2 an achievement for completing the pokedex to a certain amount.
- Kyogre: First appears in Cerulean Gym 2 (Uncatchable)
- Entei: First appears in Vermillion Gym (Get by Mystery Gift on v3.3 of PTD 1, now you can get one for 10 SnD Coins)
- Raikou: First appears in Vermillion Gym (Get by Mystery Gift on v3.3 of PTD 1, now you can get one for 10 SnD Coins)
- Suicune: First appears in Vermillion Gym (Get by Mystery Gift on v3.3 of PTD 1, now you can get one for 10 SnD Coins)
- Groudon: First appears in Viridian City (Uncatchable)
- Mew: First appears in Champion (Catchable in Unknown Dungeon)
- Victini: Special Mystery Gift for Sam's Birthday in 2011 (Get by Mystery Gift on v5.0 of PTD 1, now you can get one for 10 SnD Coins)