>>43629089If you really want them:
1. Number of pokemon used in battles is limited by the number of gym badges you have. You can always use one mon in battle, but every new badge allows you one more pokemon to use.
2. Cannot save outside of cities.
3. Only 6 pokeballs, 6 medicines and 6 other items with you all the time. Don't move and discard if you acquire more than the limit.
4. Cannot use a pokemon with the gym's weakness.
5. Cannot use starter/pseudos/legendaries against gyms or E4 members. Allowed against the final boss of the game.
6. Cannot run from a battle.
7. Cannot use more pokemon in battle than the opponent.
8. Defeat in a battle or breaking a rule (like running) = reload your last save.
9. You have 3 continues. You gain an extra continue every time you beat a gym. You lose one when you are forced to reload your last save because of the rules. The Game ends if you waste all of them.
I thought about adding a time limit and an old age rule for Pokemon, but I think it would be hard to do without compromising the core experience and the fun of it.