Im not sure if it would work but if ruby and emerald are the same then hes in the museam u have to beat 2 magma or aqua grunts (or whatever grunt is in emrald)
In the Slateport museum.
In the slateport city boat dock place
You go to slateport and you deliver the Devon goods to captain stern.
Captain Stern is on the top floor of the museum in Slateport City.
Captain Stern is first located at Slateport City. After saving Mr Briney's Peeko on the tunnel, go to Briney's hut and talk to him. After delivering the goods at Steven and finishing the gym at the Dewford town, talk to Mr. Briney and go to Slateport City. Go up and enter the museum. On the second floor, captain stern was standing next to the scale model of SS Anne.
In the Slateport museum.
In the place where the SS tidal is.
he is in the slateport harbor, right above the Pokemon center
In the slateport city boat dock place
You go to slateport and you deliver the Devon goods to captain stern.
Once you get the scanner, go to slateport and find captain stern, he will trade you a hold item for it.
Captain Stern is on the top floor of the museum in Slateport City.
Slateport city given to you by Captain Stern.
You get it in Slateport City, by Capt. Stern. Hope I helped :)
south, down the Pokemon beach
a guy will ask u if u can deliver Devon goods to captain stern..captain stern is found in the museum of slateport(specifically 2nd floor).
Captain Stern is first located at Slateport City. After saving Mr Briney's Peeko on the tunnel, go to Briney's hut and talk to him. After delivering the goods at Steven and finishing the gym at the Dewford town, talk to Mr. Briney and go to Slateport City. Go up and enter the museum. On the second floor, captain stern was standing next to the scale model of SS Anne.