Leafeon locations — where to catch

In Lumiose City (Legends: Z-A)

• Wild Zone 20 — Walk

In Paldea (Scarlet & Violet)

• Casseroya Lake — Walk
• Dalizapa Passage — Walk
• Socarrat Trail — Walk
• South Province (Area Four) — Static Encounter
• West Province (Area Three) — Walk

In Hisui (Legends: Arceus)

• Space-time distortions — Walk

Other games (2)

• Sword / Shield — The Isle of Armor (Gen 8): Ballimere Lake, Giant's Bed
• Sword / Shield (Gen 8): Giant's Mirror, Lake of Outrage

Leafeon — full Pokédex entry