Tanren Chambers/Bug Chamber

The Bug Chamber is one whose exits are often taken, as it's deemed one of the easiest to get an Exp. All from. It's known for an abundance of Slow Traps and Spore/Sleep Powder spammers.

Pokémon
Pineco -Forretress -Venonat -Venomoth -Paras -Parasect -Yanma -Yanmega -Nincada -Ninjask -Surskit -Masquerain -Butterfree -Beedrill -Poliwrath -Mawile -Gastrodon (West sea form)

Eggs hatch into Nincada and Surskit.