Pokémon Gold and Silver/Union Cave

By now the egg may have hatched, if it has click here

Level 1
Pick up the X Attack in the northwest corner, then fight the two Hikers. Continuing around the bend, there is a Firebreather, and beyond him is a Great Ball. At the far west, there is a Potion. South of it, on the plateau, is a Pokémaniac guarding the ladder down to Level 2. At the very southern edge of the map, there is an Awakening, and there is a second Firebreather guarding the way to the exit.

Level 2
There is an X Defend in the northwest corner of this area, and another Potion in the southeast corner. You cannot reach the rest of the level until you have access to Surf.