I haven't read the entire thread yet (after the first 5 pages or so I was convinced I wanted to be a part in developing this game. It sounds fucking AWESOME)
If it's still possible, I'd LOVE to help with this. As long as it isn't to do with art or programming, I can help.
If you want me to help, I saw in the OP only the data of the gym leaders of Kanto and Johto. If you want me to, I could work on the Gym leaders/ Elite Four of Sinnoh or Hoenn. I could even post movesets and EVs (if there are difficulties like Easy, Medium, Hard, Insane and/or Legend) varying on difficulty.
As in, on Easy, the Gym Leaders will have Pokemon of lower levels, have moves to just cover everything and no EVs; while on Hard, the will have EVs geared to bulk them up, or make them hit faster and stronger, also, the moves will perform a specific role (DDer, Cleric, etc.).
An example. let's say that in the seventh Gym, you meet a Flygon. On easy it would be of level 55 (depending on Gym), have no EVs, and have the moveset EarthQuake, Fire Blast, Rock Slide and Crunch @ nothing, while on Hard, the same Flygon in the same Gym would be of level 65-75, Have 128 EVs in both Atk and SpA and the moveset EarthQuake, Crunch/ Rock Slide, Dragon Dance and Fire Blast.