[ASM & Hex] How to hex edit hardcoded base stats for Gen 3 Pokémon?

I had an idea for a challenge where it's Pokémon Fire Red but every Pokémon had both Shedinja's signature ability, Wonder Guard. But every Pokémon also had Shedinja's single hit point caveat. I tried finding information on this forum on how to hex edit those stats as they're hardcoded for Shedinja to only have a single hit point even if it had its base HP increased and I'm certain it can be done, but I have no idea how to find the values for all the other Pokémon so I could change them to all have only 1 HP. If anyone can help me to find the values so I can make this a reality, I would be most grateful. Thanks for reading.

Stats and abilities are easy. There are a bunch of programs that can even do them.

Now, I could be wrong, but unfortunately I think Shedinja's HP isn't as simple as just having a base stat of 1.

There's an extra routine for him, I reckon.

Tacobell is right, you need to locate this code and make it always set newMaxHP = 1 for all Pokémon. Finding that code is probably best done by compiling pokefirered, because then the pokefirered.map file will tell you the offset of that function in your ROM.

EDIT: CFRU would also be an option if it patches that function, because then you could change the C code directly.

I'll try to use what you suggested. Much appreciated for your time.