Pokémon HeartGold and SoulSilver/Union Cave

This is a pretty short cave, but it is full of goodies. Onix and Sandshrew are new additions to your Dex. There are some Hikers using mostly Rock/Ground types, with a few Firebreathers thrown in, easily noticed by their orange hair and red clothes. There are some items on the ground, a few hidden items in some rocks, but nothing of real importance.

Pokemon
🇨🇴
 * (30%)
 * (5%)
 * (30%)
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 * (10%)

🇨🇴
 * (30%)
 * (10%)
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 * (10%)

🇨🇴 🇨🇴
 * (35%)
 * (30%)
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 * (20%)
 * (10%)

Come back here when you have HM03 (Surf) and HM04 (Strength) and you'll be able to fully explore it. On Fridays if you surf through the southwest, go down a ladder, and navigate to the end, you will find a Level 20 Lapras, which is one of the better Water/Ice hybrids. Heading out north in the basement will lead you to the Ruins of Alph, but you need HM03 (Strength) to fully navigate through.