Since the original source files that these ROM hacks are built with came out as long ago as the mid-2000’s, that you lead to the assumption that this game was made maybe a few years after. Well, this game was only finished back in 2017. This later date allowed for seven generations of Pokemon to be added to this game, some incredibly deep functions to be incorporated into this game and some modern mechanics too. So we have to commend tube developers for their long term dedication to this project.