TheZZAZZGlitch's awesome April Fools 2017 event (Game Boy reversing challenge) is now over. Here's my writeup: https://gist.github.com/Wack0/1a84651e7e7e0c6f7d5fb5888e361123
Someone else also wrote up how they solved the challenge (they went the crackme route rather than keygenning): https://gist.github.com/KernelEquinox/464fd663ffe2b3c7b69ea422d4749562