I know /topic makes the last person to edit the topic be seen, but not the people who came before them. My suggestion is when you hover your mouse (or hand) over a certain part of the topic, you see who wrote that part. This is especially useful when the topic becomes long because I don't think there's a command that does this already. I was thinking about the Trivia answers when I was coming up with this suggestion because you can see who wrote what during a Trivia game. Also making this a global command might be helpful to the uniformity of the Pokémon Online server.