Diamond City Kindergarten

The Diamond Kindergarten is a kindergarten in Diamond City attended by Kat and Ana. While it was already mentioned in WarioWare, Inc.: Minigame Mania that the sisters attend a kindergarten, it wasn't until WarioWare: Twisted! that they were seen with their class. In their story in this game, Kat and Ana were on a field trip on the Diamond Knoll with their pets Shadow the Dog and Shuriken the Falcon and other children of the Diamond Kindergarten, under the care of their teacher. The woman told the children not to wander off during the trip. However, this happended to Kat and Ana when Kat damaged a beehive with a stick, causing the angry bees to chase the sisters. They could abscond into a wooden cabin, in which they encountered the Diamond Troll. When they were done with this creature, Kat and Ana left the cabin, only to be chased by the bees again. It isn't known when and if they returned to their class.

The actual kindergarten building has yet to be seen in any game.