Okay, a few things.
I did say if you really wanted a pokemon not on the list, you were welcome to PM me about it. I had actually been considering Eevee, so it didn't take much to convince me there.
Now, about the post... Oak was traveling with Treize, a trainer-to-be at the Saro region. Lumen wouldn't have been able to not notice him. Also, Oak left to do some work of his own when the group departed from the dock, so he didn't go to the lab. Oak actually wasn't someone I planned to have in the rp, but I'm amending things to accommodate for him. 13sparx13 was the one who brought Oak in. If you want Lumen to affiliate with Oak at all, she'd probably affiliate with Treize too, so I'd PM 13sparx13 about this.