Where to catch Noctowl

In Kitakami (Scarlet & Violet – The Teal Mask)

• Fellhorn Gorge — Walk
• Kitakami Wilds — Walk
• Mossfell Confluence — Walk
• Oni Mountain — Walk
• Paradise Barrens — Walk
• Timeless Woods — Walk
• Wistful Fields — Walk

In Johto & Kanto (Gold, Silver & Crystal)

• Ilex Forest — Headbutt, Walk
• Route 11 — Walk
• Route 13 — Walk
• Route 14 — Walk
• Route 15 — Walk
• Route 2 — Walk
• Route 25 — Walk
• Route 26 — Walk
• Route 27 — Walk
• Route 37 — Walk
• Route 38 — Walk
• Route 39 — Walk
• Route 43 — Walk
• Route 5 — Walk
• Route 8 — Walk

Noctowl — full Pokédex entry