Where to catch Tangela

In Johto & Kanto (Gold, Silver & Crystal)

• Mt. Silver — Walk
• Route 28 — Walk
• Route 44 — Walk
• Sea Route 21 — Walk

In Kanto (Red, Blue & Yellow)

• Cinnabar Island — Walk
• Safari Zone — Walk
• Sea Route 21 — Walk

Tangela — full Pokédex entry