Salty Injustice

I had to beat Samson first it appeared. Then it said I was free to roam before the next episode.

I am wondering if there is anyway to revive the fossils won as prizes in Agate Circus due to the obstruction of the police officer. Are they going to remain unusable until we are free to leave the Circus? I am not sure if this is possible afterwards the gym battle has taken place as I have not reached that far yet and want to get these fossils revived before the battle.