>>47370048You wouldn't be able to complete the game under those circumstances without filling the world with too many trainers and making a 100 hour game.
Exp is fine, and i frequently go up against gyms 5 levels behind. I still steamroll them because theres always a strategy thats better than they are. You don't lose to most gym leaders if you have an attack boost with a super effective hit. You can boost with sleep powder or thunder wave.
>limit pokemon availableOnly works up to the second gym in most games
This is besides the fact that there is already an in game difficulty mode, called using bad pokemon like grumpig.
