Beanbean Castle Sewers
From the Super Mario Wiki
The Beanbean Castle Sewers are the waterworks found in the underground of Beanbean Castle. They run the water supply of the castle and Beanbean Castle Town during Mario & Luigi: Superstar Saga. Lady Lima and several other of the castle's inhabitants were locked in the sewers by Cackletta. When Mario and Luigi arrived at the castle, Cackletta, disguised as Lady Lima, pretended to not trust them so that they could go into the sewers and fix the plumbing, so as to prove that they are truly who they say they are. However, fixing the sewer's pipes caused the Beanstar's protection to be disabled, allowing it to be stolen.
Bordering or connecting locations to the Beanbean Castle Sewers include:
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