Super Mario 63 Level Designer

Super Mario 63 includes its very own level designer. In the level designer, players can create their own levels and share them online on the Level Designer Portal or through the Forums by posting codes, in a completely custom code for specifically Super Mario 63.

The Level Designer is grid based and is separated into two groups: Tiles and Items.
Tiles are used to design the background and terrain of the levels. They were split into several categories that were locked until certain circumstances were completed.
Items were open from the beginning, and provided the enemies, power-ups, obstacles, and decoration of the levels. While tiles must be placed by each grid space, items can be placed on any space.

On May 18th, 2012, Thwomps and Flame Towers were added into the Designer.