Pokémon HeartGold and SoulSilver/Dark Cave

There isn't much you can do in the Dark Cave at first. You will only have access to one room right now, but that's all you need to get a, which isn't great on it's own but with a little love and leveling, you can quickly get a very strong.

To get further into the cave, you first need to teach a Pokémon Flash to light up the cave. However, to leave the cave you will need a Pokémon with Rock Smash to destroy the two boulders blocking the exit on the ../Route 31/ side.

Here are the following Field Moves you need:
 * Flash (TM70)
 * Rock Smash
 * Strength
 * Surf

Dark Cave leads to the following routes:
 * ../Route 45/ (to Blackthorn City)
 * ../Route 31/ (to Violet City)
 * ../Route 46/ (to New Bark Town).

Items

 * Potion
 * Dire Hit
 * Full Heal
 * Hyper Potion
 * Black Glasses
 * Revive
 * TM False Swipe

Pokemon

 * Zubat
 * Geodude
 * Dunsparce