Suicune locations — where to catch

In Paldea (Scarlet & Violet)

• Casseroya Lake — Static Encounter

In Johto & Kanto (HeartGold & SoulSilver)

• Burned Tower — Walk
• Route 25 — Static Encounter

In Kanto (FireRed & LeafGreen)

• Roaming Kanto — Roaming

In Johto & Kanto (Gold, Silver & Crystal)

• Roaming Johto — Roaming
• Tin Tower — Static Encounter

Other games (7)

• Brilliant Diamond / Shining Pearl (Gen 8): Johto
• Sword / Shield — The Isle of Armor (Gen 8): Max Lair
• Ultra Sun / Ultra Moon (Gen 7): Ultra Space Wilds, Ultra Space
• Omega Ruby / Alpha Sapphire (Gen 6): Trackless Forest
• Fire Red / Leaf Green (Gen 3): Kanto
• Colosseum (Gen 3): Realgam Tower, The Under
• Gold / Silver (Gen 2): Johto

Suicune — full Pokédex entry