MapTool

MapTool is believed to be the name of the stage editor used on at least Donkey Kong Jungle Beat, Super Mario Galaxy, and Super Mario Galaxy 2. It is unknown whether it is exclusive to EAD Tokyo or part of JSystem. (todo: check other JSys games for references to it)

The existence of an internal tool for editing stages is a basic assumption, but the name is known from paths at the bottom of /ObjectData/BathtubPlanet.arc/bathtubplanet/jmap.ini:

[FHISTORY]
0=\\jcsnas2\gcdonkey$\MarioRV\MapTool\StageData\TrialProduct01\R00_tool.jmp
1=\\jcsnas2\gcdonkey$\MarioRV\MapTool\StageData\TrialProduct00\R00_tool.jmp
2=\\jcsnas2\gcdonkey$\MarioRV\MapTool\StageData\TestSpiralMap\R00_tool.jmp
3=\\jcsnas2\gcdonkey$\MarioRV\MapTool\StageData\SnowAndPeachSlider\R00_tool.jmp