Sinnoh is home to several powerful legendary Pokémon that you can catch after completing the main story or at specific points during your adventure. Here's a list of some key legendaries and how to find them:
- Dialga (Diamond) / Palkia (Pearl): Encountered at Spear Pillar during the main story. You have one chance to catch them. Save before the battle!
- Giratina: Encountered in the Distortion World during the main story. You have one chance to catch it. Save before the battle!
- Uxie, Mesprit, Azelf: The Lake Guardians. Uxie is found in Acuity Cavern (Lake Acuity), Azelf in Valor Cavern (Lake Valor). Mesprit will roam Sinnoh after you encounter it at Lake Verity, requiring the Marking Map Pokétch app to track.
- Heatran: Found in Stark Mountain after completing the Stark Mountain side quest (post-game).
- Regigigas: Found in Snowpoint Temple after catching Regirock, Regice, and Registeel (requires transferring from other games or events).
- Cresselia: Roams Sinnoh after you encounter it on Fullmoon Island (post-game).
- Darkrai / Shaymin / Arceus: Event-exclusive Pokémon, typically requiring special items distributed via Wi-Fi or local events.
Always save before attempting to catch a legendary Pokémon, and bring plenty of Ultra Balls and status-inflicting moves.