Breloom locations — where to catch

In Paldea (Scarlet & Violet)

• Dalizapa Passage — Walk
• West Province (Area Three) — Walk, Static Encounter

In Johto & Kanto (HeartGold & SoulSilver)

• Johto Safari Zone — Walk

Other games (2)

• X / Y (Gen 6): Friend Safari
• Black 2 / White 2 (Gen 5): Hidden Grotto, Pinwheel Forest

Breloom — full Pokédex entry