Even tho I don't understand French pretty much at all, I'm giving this a go because of Crystal and all those pretty changes.
Also, wanted to drop these non-experience-breaking Action Replay codes that I've found over the internet and tested myself that worked.
Instant message speed
Go to the Pokemon Summary while holding: L to view the EVs, R to view the IVs.
It would be better if we could also disable the attack animations, but whatever, the game goes fast enough. Nice work, greetings from Uruguay <3
EDIT: LOLWAT? I didn't expected for the Bug-Catcher before Violet City to have a Ledyba with Thunderpunch
EDIT2: Wow, things are harder than I thought, I totally understimated the Sprout Tower and got rekt because of those Hoothoot anihilating me after the Bellsprouts effort, I guess I'll have to take this more seriously
By the way, I'm kinda intrigued, how did you enabled 60FPS in these NDS Roms? It's pretty freaking awesome, no more feeling like a retard running at turtle pace, yaay.
^ EDIT: Nvm, found the way to remove the Framerate Limiter on my own, thanks to Google.
EDIT3: Had to restart my save because of some unnecesary-to-explain things and my Lv12 Totodile is getting rekt with the very 2nd trainer of the game, Pidgey's Sand Attack and Hoothoot's Hypnosis are a brutal combo, add to that the fact that you forced the players to not be able to use items in Trainerbattles and you have some serious troubles since the very beginning.
EDIT4: And I thought at first that you changed the GB Sounds for the NDS ones and viceversa in a way that using the GB Player would enable the NDS Style for the songs, but nope, even if you enable the GB Player, it restarts the map's music using the GB Sounds so there's no way to actually use the NDS tracks at the player's will, that's not really cool.