There are several side missions/quests in PRO and sometimes I tend to forget them over time, simply because the main story is not affected by them. So I would like to suggest implementing some form of a notepad or to-do list in the game(let's call it Quest Log), where you have the opportunity to add some paragraphs with text by your self and pin quests to it. For example when you agree to help an ingame person with something, or a person wants to trade his Pokémon with yours, you should be prompted, if you would like to pin it to the Quest Log for later, where it also stores some information, like the route number of the pinned quests.
I couldn't find any threads with something similiar, but I would appreciate it if someone has any thoughts or improvements!