Where to catch Kakuna

In Johto & Kanto (Gold, Silver & Crystal)

• Azalea Town — Headbutt, Walk
• Ilex Forest — Headbutt, Walk
• Lake of Rage — Headbutt, Walk
• National Park — Bug-Catching Contest, Walk
• Route 2 — Walk
• Route 26 — Headbutt, Walk
• Route 27 — Headbutt, Walk
• Route 30 — Walk
• Route 31 — Walk
• Route 34 — Headbutt, Walk
• Route 35 — Headbutt, Walk
• Route 36 — Headbutt, Walk
• Route 37 — Headbutt, Walk
• Route 38 — Headbutt, Walk
• Route 39 — Headbutt, Walk

In Kanto (Red, Blue & Yellow)

• Route 24 — Walk
• Route 25 — Walk
• Viridian Forest — Walk

Kakuna — full Pokédex entry