This is sort of a two part question. Firstly, do ALL the side quests need to be completed by ONE character? On my original file with Wilhelm the quest “Another Pickle” glitched on me and Bruce did not appear/didn’t register when I killed him, so I was unable to complete it and turn it in. If I complete it with my second character Claptrap, and then at some point carry on with Wilhelm will it count towards the trophy, or do I need to do all the quests with Wilhelm/Claptrap, for example?
I have been playing with friends in co-op as Claptrap. I know if I go back and do the quest again on their file with my Wilhelm it gives me a second shot at it, but as my Wilhelm is currently 12 levels ahead of my friends characters, it may not be practical to do this, as the enemies levels will be far in advance of their own.
Secondly, I heard that this trophy can sometimes glitch and not pop when the game is played in co-op. Has this been patched yet?
I’m assuming this is on the Playstation, but from the things I’ve read and my experience from BL2, it all has to be done on ONE character. If the character were to join someone else’s co-op game while the mission is completed, you should still get credit for it IF you already have that difficulty unlocked. If you were to join your friends game on UVHM and make it too difficult for them, you have two options. Either join when it’s just 2 people, and see if you can “solo” the mission on 2 player difficulty; your friend can still use their action skill or a cryo weapon to support but they wont be dealing any real damage. Or you can join a random person’s game and ask if they have this mission available and want to do it at that moment.
Yes, one toon, just like in BL2.