Where to catch Bellsprout

In Kitakami (Scarlet & Violet – The Teal Mask)

• Apple Hills — Walk
• Kitakami Road — Walk
• Loyalty Plaza — Walk
• Mossfell Confluence — Walk

In Johto & Kanto (Gold, Silver & Crystal)

• Route 24 — Walk
• Route 25 — Walk
• Route 31 — Walk
• Route 32 — Walk
• Route 36 — Walk
• Route 44 — Walk
• Route 5 — Walk
• Route 6 — Walk

In Kanto (Red, Blue & Yellow)

• Route 12 — Walk
• Route 13 — Walk
• Route 14 — Walk
• Route 15 — Walk
• Route 24 — Walk
• Route 25 — Walk
• Route 5 — Walk
• Route 6 — Walk
• Route 7 — Walk

Bellsprout — full Pokédex entry