Your picture looks shopped imo, we did some research and I'm pretty sure he was with me at the same time when he said pen island. This is what I've found.
Please check the evidence and check the times when he was online, and also check the kill logs! He's there with diamond armour, if v0rtex was killed after I was killed, that was when he was outside PvPing, he died a few times. Now, around the time of when he said penisland, if he WAS flyhacking, he should die about a second later, unless this was completely shopped. Anyway, here:
Edit, also, his chunks are still generating, pro timing from when you spawned