Pallet Town

A World Expands

After defeating the elite Trainers at Indigo Plateau, the new Champion returns home to Pallet Town. Professor Oak pays you a visit and inspects the progress you have made on your Pokédex. He tells you that he has a favor to ask, and leads you to his lab. The professor explains that there have been many sightings recently of rare Pokémon species that have never been seen before in Kanto. He would like to study these Pokémon for himself, but his advanced age means that he must rely on you instead. Blue enters a short time later, and Oak takes each Trainer's Pokédex for a moment. If each device has recorded data on at least 60 different species, he upgrades them to National Mode. This enhancement enables the Pokédex to identify these rare Pokémon species so that you may now begin encountering them. Blue insists that he will be the one to complete the Pokédex, and considers looking around One Island first. Follow his lead and use Fly to return to Vermilion City and take the ferry back to the Sevii Islands.

One Island

One Island (Town)

Pokémon Network Center

Speak to Celio to learn that he is modifying his Network Machine. This update will allow it to accommodate long-distance trades, but in order to do so, he says that the machine requires a special type of gemstone. It is rumored to be somewhere on One Island but he has not been able to find one yet.

Mt. Ember

Exterior

Go east from the Hiker near the entrance to find that the two Team Rocket Grunts have finally punched through the wall. They can be overheard excitedly planning to bring any treasure they may find back to the Rocket Warehouse. The building seems to require two passwords to enter. One of the Grunts has already forgotten them, but the other helpfully reminds him of the first one: "Goldeen need log". But before he can reveal the second password, they realize that you have been listening in and draw you into battle. Defeat them and they run off to regroup, leaving the new cave entrance exposed.

Ruby Path

1F

There are several rocks in the first tunnel that can be cleared with Rock Smash. Go northwest and climb down the ladder.

B1F

Head northward and pass through more breakable rocks to reach the ladder.

B2

Go east to find the path blocked by several boulders. Use Strength to move the first boulder (→2) eastward. Take a few steps to the southeast and push the second (→1) eastward, as well. Move the northernmost boulder (↑1) northward, then go south and climb down the ladder.

B3F

Clearing the breakable rocks on this level may reveal wild Slugma or Magcargo, some of the rare Pokémon Oak spoke of when he upgraded your Pokédex. Head east and use Strength to move the boulder (→1, ↓1) southeastward to clear a path. A short distance ahead, the path splits in two. Follow the southern tunnel and push the boulder all the way westward. Walk down the stairway and climb down the ladder to the south.

B4F

On this level, a series of glass panels are arranged to display the Braille alphabet, letter by letter. Climb down the ladder in the southeast corner.

B5F

Examine the pedestal to obtain the Ruby. A panel on the north wall features another Braille inscription. Take the ladder and climb back up to B3F.

B3F

Return to the branching tunnels and take the eastern path this time. Move the northern boulder (→1) eastward, then the southern boulder (←1) westward. Continue southward and climb up the ladder. This short path acts as a shortcut back to the entrance, ending in the northeast part of 1F.

One Island (Town)

Pokémon Network Center

Return to Celio to deliver the Ruby. He happily installs the gemstone in his Network Machine, but has another favor to ask. While studying gemstones, he discovered that there is a second that forms a pair with the Ruby. The only information that he has to work with is that it is somewhere in the Sevii Islands. To help you on your new quest, he takes back your Tri-Pass and gives you his personal Rainbow Pass, which allows travel among all seven of the islands. He also adds another page to your Town Map that shows the other four islands.