Brooklyn Plumbers Academy
From the Super Mario Wiki
“When the plumbing gets tough, the tough get plumbing.”
The Brooklyn Plumbers Academy is an academy that teaches people how to be plumbers and was founded by Salvador Drainado, the best plumber in the world. The teaching methods at the academy are mostly drills and are taught by Sergeant Kooperman. Mario and Luigi were taught at the academy and presumably Wario. The Brooklyn Plumbers Academy first appeared in The Super Mario Bros. Super Show! episode Plumbers Academy.