Strange things are found in the City Sewers. The City of Marada health authorities has made it illegal for pets to ride down the Sewer Pipes and swim in the sewage. They believe its unhealthy, dangerous and sometimes deadly. However, if you complete the Sewer Pipes Treasure Map you can find a secret way into the Sewer Pipes, where one of your pets can ride through the pipes once every 6 hours, earning either Gym Stats, Elite Gym Stats or MP. Buy a Sewer Pipes Giftbox from the Giftbox Shop and you can use Sewer Pipes twice as often for life!
The Sewer Pipes Treasure Map was introduced in the Hero/Villain Account Upgrades of November 2009. You can obtain it from the May 2018 Bug Account Upgrade.