Why is FireRed/emerald the base of so many ROM hacks?

Question

Yeah, that would be fine. We’d just have to manage the thread so that the subject isn’t shifted to hack games themselves.
Include in the post I said this so you don’t have to deal with flags.

Fizz approved of this question. You can check my wall. The above quote was by Fizz too.

Comments

Maybe they're easier to hack?

Answer 1

Because all of the hacking tools were made for those specific games(including Ruby), and as sumwun says, the most usable and "popular" tools make Emerald and Fire Red super easy to hack. There are also new features that have been developed for only Emerald and Fire Red like the Gen 7 Battle Engine for Emerald, the JPAN hacked battle engine for Fire Red, and the MrDollSteak patch for Fire Red.

Tl;Dr
They're easier to hack because of all the tools that support them

Source: I'm a ROM Hacker myself