Onix Tunnel

The Onix Tunnel (Japanese: イワークの洞窟 's Cave) is an -exclusive location in Johto located between Azalea Town and Goldenrod City.

The Onix Tunnel is a cave that possesses many s and s. Despite the dangerous  that live inside, the cavernous pass is a shortcut through the mountains.

The Onix proved to be an obstacle for. Though for and, the shortcut was an easy walk thanks to  who  the Onix to. deduced that the echoing properties of the cave probably made Jigglypuff's song stronger. Later, Team Rocket attempted to travel through again, but Jessie inadvertently disturbed the Onix. Subsequently, Team Rocket found themselves in some trouble, Jessie even wishing that Team Rocket was blasting off.

Trivia

 * The Onix Tunnel resembles the Union Cave in Pokémon Gold and Silver and their remakes, as both contain  and can be entered from Azalea Town.

In other languages
Onix-Tunnel Galleria degli Onix 大岩蛇洞窟