Who needs tools to hack? If you can only hack without tools then your not a hacker. I am not deriding on tools, they significantly save time, and are useful. But I can in sure you, there was lots of actual hacking preformed in Pokemon Light. Take for instance the mugshot hack. ASM was required for that. If all the gba tools suddenly vanished, Light would still have all it's features, all it's maps, and all it's scripts. Hence it is not harder to hack gbc games, it is fact harder to hack gba games because they are more complex. People think it's easier to hack gba series games because their is just more known data out there. (You tr hacking Zegend Of Zelda Minish Cap and tell me there that isnt more complicated then gold. Also there are tools for gb hacking, there is gold map, and script editors. Also there is already a complete rom map of Pokemon Red, so in essence Red is the easiest to hack by your logic.