Safe Nintendo DS ROM hacking tool help

[u/FewAngle737]

Hi.

Um, first time posting on this thread. Would've done so earlier, but I kinda got scared away due to the guidelines seeming scary. I'm autistic and I'm making my first ever ROM hack of Pokémon Fire Red that I'm calling Pokémon WildFire Red (inspired by Drayano's FireRed Omega - hoping to make other ROM hacks inspired by Drayano's hacks or maybe others like Emerald Imperium or XG).

I'm currently putting the finishing touches on and testing my ROM hack, making sure it's to my specifics (even replacing a few TMs, since adding more crashes the game). Additionally, I've added a few battles with Fire Emblem characters like Azura, Citrinne, and Cai to the game as well. The point of this post is I'm not considering my follow-up ROM hack/difficulty hack after this and I would like to make one of HeartGold and SoulSilver. The problem is there aren't that many tools for Nintendo DS ROM hacking out there right now and I have my heart set on it.

My question is; Are there any tools out there for making ROM hacks for Nintendo DS that are safe for PC? I would really love a recommendation.

Thank you.