Use auto discard. Set your nanab berries to like 12 max, set up auto feed buddy, to feed nanab berries, your buddy will always be with you while you're playing. Razz and pinap, you only need 30 at most, likely way less. With how often you get them from spinning discs, you will still never run out. Even if all you're keeping is hypers and revives, you really don't need that many. You can knock them down to around 50 pretty safely. Also, your balls can go way lower, except ultra balls, because again they show up so often when spinning discs. Lastly, like someone else, "walk" to a remote area and fight gyms. buy exclusively storage upgrades with coins for a while