Yeah, I looked at DJG's post.
Joseph is in a little area in the mineral cave on current path I think.But he is guarding Yiyan.
And if you go to the ranger base theres a scientist that can revive the fossil
Wujifin is found in Team Earth's base - where the submarine is
And about Ho-Oh... I think its event is different from the previous beta's. There is an entrance to Ilex Forest in Green Leaf (according to DJG...)