Thanks for the back follow ;) I really love to see people work on retro games and giving them a new life and look with modern technology. Your game looks also great! I use Gamemaker Studio 2. I already had the missingno glitch on my mind already but thanks eitherway for the recommendation :) Because you are also working on a gen 1 pokemon game, i could help you out with data sets and formulas for battle system etc if you need something, just pm me.