How to change trainer pokemon's evs in ppre

[TheInfiniteGyre]

I have been rom-hacking platinum recently, but in the trainer editor of PPRE, I don't where or if I can control the opponents ev's and iv's in ppre.
Thanks for your help!

 

[Buffel Saft]

Trainer EVs can't be edited in PPRE because trainer mons in Platinum all have zero EVs outside of the Frontier. IVs can be though; they're the "u0" field in the editor, but they're stored as a value between 0 - 255 instead of 0 - 31. To calculate the actual value you can use this equation: IV = u0 * 31/255 e.g if u0 = 255, then IV = 255*31/255 = 31. Don't know why Game Freak did it that way but that's what we're stuck with!

 

[TheInfiniteGyre]

Thank You so much!

 

[PR3D4TOR]

@Buffel Saft

Is there an actual way to edit EVs in Gen 4/5? Or are we stuck with IVs?

 

[Buffel Saft]

@Buffel Saft

Is there an actual way to edit EVs in Gen 4/5? Or are we stuck with IVs?

Yeah, but you'd have to change how the trainers work to do it, which would require an ASM hack. Meromero did it in his HGSS hack Mind Crystal, but I haven't seen it done in any other hacks since then.

 

[DeluxEquity]

@Buffel Saft

Do you know of a way to view the nature a Pokémon will have when editing the u0 value? I know as that value changes, the nature changes. But I believe the value (at least for nature) is independent for each Pokémon.

 

[Buffel Saft]

@Buffel Saft

Do you know of a way to view the nature a Pokémon will have when editing the u0 value? I know as that value changes, the nature changes. But I believe the value (at least for nature) is independent for each Pokémon.

Yep you can use this: https://hzla.github.io/Plat-Nature-Calc/. The game calculates a PID for each trainer mon from a few things and then does PID % 25 to get the nature. It's not worth calculating it by hand but that tool can do it for you.