In Pokemon go, once a day you're able to send a free gift to your friends. When starting off at base level, it only contains simple items, something like a potion and 2 pokeballs. However, each time you gift each other, your friendship slightly increases, and after weeks of gifting, you're able to get better items like hyper potions or great balls. I think something like this would be totally balanced for PokeMMO, and it would give players more motivation to use the community tab.