You can battle Horon in Dark Valley, if you win without letting one of your pokemon faint Darkrai respawns for another chance to catch it.
From what Ive heard Gyarados with Moxie or dragon dance can beat him easily.
good luck
Some guilds have their own discord as another area for information and communication. Most big guilds also have a guild thread with information here on the forums. However thats completly up to the guild itself so maybe your guild does not have a discord or a thread.
I play on Gold Sever so I dont know your guild. Maybe your guild just exists to get the free xp bonus but I cant know for sure obviously.
If a person is in a guild you should be able to see their guild emblem. Do you see the names at all? If not maybe you have it off in options.
Hope I could help you out a little.