Where to catch Rhyhorn

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

• Savanna Biome — Walk

In Hoenn (Ruby, Sapphire & Emerald)

• Safari Zone — Walk

In Kanto (Red, Blue & Yellow)

• Cerulean Cave — Walk
• Safari Zone — Walk

Rhyhorn — full Pokédex entry