I wanna make a mod for the game SMT V by adding new items, changing yhe affect of skills,, changing bosses attack patterns and values, etc. I wanna know if this is possible before I try
Everything is possible. Depends on how much work you want to put in it.
But you must find yourself if what you are looking for is in assets or executable.
depends of the game, some have complete mods (Skyrim).
other have reskins.
also depend of your motivation and available tools to do so (or your capacity to create tools and reverse game files.)
First is to dump your cartridge and unpack NCA files
It's absolutely possible. Someone wrote a complete online multiplayer for Super Mario Odyssey. But don't count on finding anything ready for such modding, you will likely have to reverse engineer the game yourself (as stuff like what you want to modify can be in data files as simple scripts, but could also be part of the executable).
It's absolutely possible. Someone wrote a complete online multiplayer for Super Mario Odyssey. But don't count on finding anything ready for such modding, you will likely have to reverse engineer the game yourself (as stuff like what you want to modify can be in data files as simple scripts, but could also be part of the executable).