Male dorms
The newcomers completely changed the situation. After an eternal wait under the desks, full of suspence, everything was now happening so quickly.
"The door!" was all that Lucas said, this time yelling at the trainer from outside, before running towards the exit and Grimace in a desperate attempt to exit. But there was Aliah inside, too. As if that wasn't enough, Lucas had to stop himself right outside the door, as Johnny and another trainer (not the one who opened the door) had just crashed into each other, and their Pokemon did the exact same thing.
Lucas then placed himself so that he would block the door and not allow it to close, hoping that Aliah would have come out too.
"Are you all alright?" Lucas asked, panting and leaning on the dorm's door that he was trying to keep open. "The dorms seem to be infested by some ghosts, you're better off staying outside. But, some people is still inside. Aliah, Sim, and maybe some other students. Are we going to continue with our plan?"
He looked at Johnny first, then at the other students. It was most likely the first time he met them. "Now that we are outside we can contact the higher-ups (instead of my Gastly), but remember that there is still people inside. Also, I can't really keep this door open forever so that is not an option." he added.
Grimace's attempts at communicating didn't work at all. He was about to use Hypnosis on the trainer, but letting him open the door was probably a much better thing to do: after that rapid sequence of events (including Johnny passing right through him), now Lucas and the others were out of that infested place.
All he did after that was moving closer to his trainer, happy to see that he was safe and observing the newly arrived students.