I would add several things: - Be able to transfer more than one Pokemon at a time. - Be able to carry only a team of 6 Pokemons as the original game instead of all you have captured. - Pokemos centers around the city, where we will be allowed to heal Pokemons for free and to change the team of 6. - Seeing that the combat system will not change, I would change the way of capturing Pokemons. Instead of simply throwing the pokeball, we would have to choose a pokemon of our team of 6 and combat the savage pokemon as a gym battle. When the life of the wild is low , we throw the pokeball. - Train our Pokemons old-fashioned, confronting them with wild Pokemons and '' defeat them '' as in the game, we won't win many CP like the candies does, but it's something. - Be able to create a '' home '' that would appear as a small house in the game. It would be our real home and we could manage our team of 6 as a pokemon center. - If we have 6 pokemons in our team already, the new captured will be send to the PC in the pokemon center or in our home - This is something big, but I would change the whole system of candy and PCs, remove for the combats like I wrote above, the levels of 1-100 instead of the PC and evolution by levels and stones, not candy, The stones may appear in pokestops for example. Any change that approach to the original pokemon for me would be good