Advice: No sharks were harmed in the 60 tests I made to find the main health values.
After some search, I found out what's the deal with the Health cheat not working and removed it.
If anyone wants to help, start a new game and play until you reach Fawtick Bay. There, at lvl 1 the health is 500, and the value is float.
My easiest way to find it is by searching 500 with float normally, taking 5% or 10% damage, and searching again using an unknown value between (A...B) 300 and 499. (I can also confirm that at lvl 15 the health is around 1775 due to some tests)
Search for 2 addresses with the same value, freeze both, and take damage to confirm.
Now, look at the end of both addresses and find the one that ends with 68. The cheat I made previously uses the 6C address, so ignore it.
The problem I'm facing is: I find the lvl 1 health pointer and it works fine while at lvl 1, but if I try to use it in my lvl 15 save, the game crashes.
I will try to find the pointer that holds the general health addresses but as I'm not experienced with it, I beg for the help of you guys.