Mushroom Kingdom Orphanage
The Mushroom Kingdom Orphanage, or just the Mushroom Orphanage, is apparently an orphanage inhabited by Mushroom children who have been orphaned in some way; the Mushroom Kingdom Orphanage was occasionally mentioned in The Super Mario Bros. Super Show!, and appeared once in The Adventures of Super Mario Bros. 3.
The Mushroom Kingdom Orphanage was first mentioned in "The Great Gladiator Gig / Bonkers from Yonkers", which has Mario, Luigi, Princess Toadstool and Toad attending a benefit spaghetti dinner for an orphanage in the Linguine Empire. After some trouble with Emperor Augustus Septembres Octoberus Koopa, who had made everything up about a spaghetti benefit dinner, Mario, Luigi, Toad and Princess Toadstool made their own benefit dinner for the orphanage.
In the episode "Mario and the Beanstalk / Bats in the Basement" it is revealed that the Mushroom Kingdom Orphanage is on the verge of closing for unknown reasons and that one hundred gold coins are needed to keep the orphanage open. After a lot of difficulty involving a a con man cow salesmen, a giant beanstalk and King Koopa, the one hundred gold coins needed for the orphanage is eventually obtained when it rains down from King Koopa's castle in the sky as the castle collapses to the ground.
The Mushroom Kingdom Orphanage eventually appeared in The Adventures of Super Mario Bros. 3 episode "Tag Team Trouble". In the episode, the orphanage resembled a large Toad House. Princess Toadstool had given Toad a sack with million gold coins which he then delivered to the orphanage. Upon reaching the orphanage, lifting the heavy weight of the sack caused Toad to fall asleep in front of the orphanage after ringing the doorbell. Although the Mushroom Nanny inside the orphanage received the money, Toad wrongly assumed that it was stolen by Bowser and Cheatsy Koopa.
After a long ordeal involving a wrestling match, Mario and Luigi were able to win a million gold coins, which Toad brought to the orphanage. When Toad delivered the second bag, the Mushroom Nanny gave him her "double thanks" for Princess Toadstool's "double generosity". When Toad put two and two together, he fainted.