Hi there! I've been trying to HC nuzlocke this, cuz it seems like a fun and interesting challenge, and for the most part it is. There's this interesting tension between just how fuckin ganked the difficulty curve is in fire red and the obvious difficulties induced by the hack. Getting past surge consistently has been a really interesting journey.
However, I find myself vexed at every turn by slight differences between this game and vanilla Fire Red, notably, enemy pokemon /are not the same/. Surge's (and, indeed, other trainers!) Voltorb should be soundproof, not static, Misty's Staryu should never live a level 21 neutral fearow's secret power after Brock's Badge Boost (you can calc it by adding a silk scarf) and, Misty's Starmie doesn't have the Naughty Nature it's supposed to (it sees waterpulse doing more damage than swift when it shouldn't in some cases).
Seems like the enemy mons have been reshuffled a bit, which, in invalidating my documentation, makes this difficult task decidedly less pleasant... Having access to accurate calcs is one of the great advantages of the hack, I know exactly how much damage the enemy will do each turn!