How do people make fan made games?

Question

Im saying this cause people made pokemon chaos black how did they do this

Comments

This doesn't break the rules. Ike is not asking for cheats of hacks, but he is interested to learn about how it's done.

Answer 1

Like NJ said, many games are hacked from within the actual cartridge of the game. Most Hacks can be done with open-source software, but Chaos Black was made purely by extracting and editing the game's C++ and C# coding.

Other fangames can be made with game-developing tools like RPG Maker, Game Maker, Multimedia Fusion, etc. However, these normally take longer, despite needing less technical knowledge.

Answer 2

They actually hack an older games like Fire Red or Emerald.