|Golbat||Poison/Flying||Cave/Surf||100% (Cave), 50% (Surf)|
|Zubat||Poison/Flying||Horde/Surf||100% (Horde), 50% (Surf)|
|Magikarp||Water||Old/Good Rod||65% (Old), 60% (Good)|
|Barboach||Water/Ground||Good/Super Rod||5% (Good), 100% (Super)|
Go north to find TM11 (Sunny Day), then head on down.
Feel free to use Flash. Either way, go off to the north to find a Full Heal , then go back south and head east. At the next two-way fork, go north and examine the spot just west of the boulder at the end to find an Escape Rope , then head far to the south and downstairs.
Go southeast and use the stairs to hit the ground, then go north and use the Dowsing Machine to get a Nugget . Then return to the central platform and use the westbound stairs in the southwest corner to go down.
Head north and upstairs, then use the Dowsing Machine to find a Super Potion . Go northeast and downstairs from there, then down to the next floor via the stairs next to the Strength boulder.
Nothing is really here for the moment, though you'll find the Legendary Heatran here later on. For now, leave altogether.