Peruse the digital version
In the lower left of this Nintendo-approved image, it looks like Mario is holding hands with himself. It’s far from the only strange sight in the Super Mario Maker idea booklet.
Ahead of the game’s Friday release, you can look at a free digital version of the book.
It has concept art, level ideas, and delightfully odd imagery. Also, those numbers next to the key symbols are codes you can redeem in the online manual to watch corresponding videos. Cool.