Where to catch Mareep

In Paldea (Scarlet & Violet)

• South Province (Area Two) — Walk

In Hoenn (Ruby, Sapphire & Emerald)

• Safari Zone — Walk

In Johto & Kanto (Gold, Silver & Crystal)

• Route 32 — Walk
• Route 42 — Walk
• Route 43 — Walk

Mareep — full Pokédex entry