Where to catch Magmar

In Blueberry Academy (Scarlet & Violet – The Indigo Disk)

• Coastal Biome — Walk
• Savanna Biome — Walk, Static Encounter
• Torchlit Labyrinth — Walk

In Johto & Kanto (Gold, Silver & Crystal)

• Burned Tower — Walk
• Mt. Silver Cave — Walk

In Kanto (Red, Blue & Yellow)

• Pokémon Mansion — Walk

Magmar — full Pokédex entry