Pushmo Park (SSB Ultimate)
Pushmo Park is the brainchild of Papa Blox, an elderly man who created a giant playground of puzzles for the children of the neighborhood all to enjoy. For this park, he invented giant block puzzles called Pushmo, giant structures made of colored blocks which slide in and out of a wall...
fantendo.fandom.com
Now I'm sad that there wasn't any Pushmo stage in the 3DS game.