Titan Cave
Story
Cross the Titan Cave and stop Team Gaia.
Other
Traveling Pokémon nurse
To fully explore the cave you need the Hover Board and the Smash Hammer
If you have the Hover Board (Surf) in your bag, you can enter through the side entrance into a cave section where you can encounter a Larvitar.
Items
Potion
Paralyz Heal
Ether
Nature Ball
Escape Rope
Blue Shard
Nugget (Surf)
TM39 Rock Tomb
TM94 Rock Smash (Rock Smash)
TM02 Dragonclaw (Surf)
Encounter