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It is if you know what you're doing.
By clicking the lowest button: "Calculate ..." on random maps you can make their connections to mess up.
I wont do that then. I did a test and it worked out, I connected Cinnabar Island to the Pokemon League Gate (outdoors) but it failed a little bit, I think it's cause I left those bottom two spots blank.
I'm working on Sterling Silver: Cry of Celebi, if you have any questions, suggestions, or comments, feel free to email me