The MaGMML2 devkit is over a year old. It has plenty of bugs, and will be somewhat incompatible with the MAGMML3 devkit. Only use it if you want to get an idea of what entering is like with possible practicing or want to code assets in advance.

The Devkit
Released on January 9th, 2017, the MaGMML2 devkit was a gigantic step up from MaGMML1's. It was based off the much more modern and stable Mega Engine by WreckingPrograms, and it boasted nearly every enemy and gimmick from the classic 1-6 games, as well as some stuff from later games.
That being said, though, that doesn't mean it's perfect. Some of the code is a total mess, and of course, there's bugs. That being said, no one is stopping you from downloading it.

Download (Dropbox)