Where to catch Lanturn

In Blueberry Academy (Scarlet & Violet – The Indigo Disk)

• Canyon Biome — Walk

In Johto & Kanto (Gold, Silver & Crystal)

• Cinnabar Island — Super Rod, Walk
• New Bark Town — Super Rod
• Olivine City — Super Rod
• Pallet Town — Super Rod
• Route 26 — Super Rod
• Route 27 — Super Rod
• Sea Route 20 — Super Rod
• Sea Route 21 — Super Rod
• Sea Route 41 — Super Rod
• Vermilion City — Super Rod

Lanturn — full Pokédex entry