HeartGold & SoulSilver Union Cave
The flooded basement of this Azalea-to-Alph passage holds Johto's one dependable Lapras, though it surfaces only on Fridays, so trainers time the trip to the day.
Union Cave is in Johto, with Route 32 to the north. In the story it comes after Ruins of Alph and continues south to Route 33.
UNION CAVE MAP
Union Cave sinks three floors on the southward route, the top two an ordinary walk and only Surf reaching the flooded bottom.
Union Cave Walkthrough
1F
- From the Route 32 entrance, follow the passage to the north stairs, where Firebreather RayFirebreather Ray₱288
VulpixLv 9Weak toWaterGroundRock battles you. - Take those north stairs down to B1F for a machine before you finish the crossing.
B1F
- Pick up TM39 Rock TombTMTM39 Rock TombRockClassPhysicalPower50Accuracy80%PP10Large boulders are hurled at the foe to inflict damage. It lowers the foe's Speed.WhereB1F, west of the stairs from 1F west of the stairs from 1F.
- Then climb those same stairs back up to the floor above.
TM39 Rock Tomb
Revive
Requires HM04 StrengthMoveStrengthNormalClassPhysicalPower80Accuracy100%PP15The foe is slugged with a punch thrown at maximum power. It can also be used to move boulders. + Plain Badge
The Strength Boulder is a shortcut. Clearing it saves 15 steps to Route 32, and opens no ground the reader cannot already reach.
1F
- Hiker DanielHiker Daniel₱352
OnixLv 11Weak to4×Water4×GrassIceFightingGroundSteel battles you first on the way south, and Hiker RusselHiker Russel₱256
GeodudeLv 4GeodudeLv 6GeodudeLv 8Weak to4×Water4×GrassIceFightingGroundSteel's Geodude trio follows. - Next come Firebreather BillFirebreather Bill₱192
KoffingLv 6KoffingLv 6Weak toGroundPsychic's Koffing pair and Poke Maniac LarryPoké Maniac Larry₱704
SlowpokeLv 11Weak toElectricGrassBugGhostDark's Slowpoke, before the south exit to Route 33. - Back with SurfMoveSurfWaterClassSpecialPower95Accuracy100%PP15It swamps the entire battlefield with a giant wave. It can also be used for crossing water., check the stalagmite on the 1F islet north-west of Poke Maniac Larry for the hidden Big Pearl.
- Then surf to the southwest stairs, which stand on a landing only the water reaches, and go down to B1F.
Big PearlB1F
- Poke Maniac AndrewPoké Maniac Andrew₱1,536
MarowakLv 24MarowakLv 24Weak toWaterGrassIce battles you a few steps from the landing with a pair of Marowak. - SurfMoveSurfWaterClassSpecialPower95Accuracy100%PP15It swamps the entire battlefield with a giant wave. It can also be used for crossing water. east to face Poke Maniac CalvinPoké Maniac Calvin₱1,664
KangaskhanLv 26Weak toFighting beside the stairs down to B2F.
B2F
- SurfMoveSurfWaterClassSpecialPower95Accuracy100%PP15It swamps the entire battlefield with a giant wave. It can also be used for crossing water. to the Elixir in the northeast corner of B2F first.
- Face Ace Trainer GwenAce Trainer Gwen₱1,320
EeveeLv 26
FlareonLv 22
VaporeonLv 22
JolteonLv 22Weak toFightingWaterGroundRockElectricGrass, then search northwest of Ace Trainer Gwen for the hidden CalciumCalciumA nutritious drink for Pokemon. It raises the base Sp. Atk (Special Attack) stat of a single Pokemon.B2F, northwest of Ace Trainer Gwen (hidden). - Ace Trainer NickAce Trainer Nick₱1,560
CharmanderLv 26
SquirtleLv 26
BulbasaurLv 26Weak toWaterGroundRockElectricGrassFireIceFlyingPsychic battles you with Charmander, Squirtle and Bulbasaur, and Ace Trainer EmmaAce Trainer Emma₱1,680
PoliwhirlLv 28Weak toElectricGrass's lone Poliwhirl is the strongest team here. - A Lapras surfaces in the southernmost pool only one day each week, so come back on that day if the pool is empty.
- Retrace the stairs back up to 1F, then leave by the south exit to Route 33.
Calcium
Elixir
Highest-level fight · fight 1Ace Trainer EmmaPoliwhirlLv 28₱1,680PoliwhirlLv 28Pokemon Encounters
Lapras appears deep in the cave on Friday only, a powerful once-a-week catch at level 20 that is well worth the wait. Onix and Geodude work the walls, Sandshrew adds a HeartGold-only digger, and the lower water holds Goldeen on the rods.
Old Rod2
Good Rod2
Super Rod3
Old Rod2Good Rod2Super Rod3
Old Rod2
Good Rod4
Super Rod4
Lapras
ITEMS
Union Cave hides TM39 Rock Tomb, useful for trapping faster foes with a Rock move. A Calcium and several X-items sit in the side rooms, with a hidden Big Pearl to sell.
TM39 Rock Tomb
Rock Tomb deals damage and lowers the target's Speed by one stage.
TM39 Rock Tomb
Rock Tomb deals damage and lowers the target's Speed by one stage.
Calcium
A nutritious drink for Pokemon. It raises the base Sp. Atk (Special Attack) stat of a single Pokemon.
Awakening
A spray-type medicine. It awakens a Pokemon from the clutches of sleep.
Great Ball
A good, high-performance Ball that provides a higher Pokemon catch rate than a standard Poke Ball.
Potion
A spray-type medicine for wounds. It restores the HP of one Pokemon by just 20 points.
X Attack
An item that raises the Attack stat of a Pokemon in battle. It wears off if the Pokemon is withdrawn.
X Defense
An item that raises the Defense stat of a Pokemon in battle. It wears off if the Pokemon is withdrawn.
Elixir
It restores the PP of all the moves learned by the targeted Pokemon by 10 points each.
Hyper Potion
A spray-type medicine for wounds. It restores the HP of one Pokemon by 200 points.
Big Pearl
A quite-large pearl that sparkles in a pretty silver color. It can be sold at a high price to shops.
Great Ball
A good, high-performance Ball that provides a higher Pokemon catch rate than a standard Poke Ball.
Paralyze Heal
A spray-type medicine. It eliminates paralysis from a single Pokemon.
Revive
A medicine that revives a fainted Pokemon. It restores half the Pokemon's maximum HP.
X Speed
An item that raises the Speed stat of a Pokemon in battle. It wears off if the Pokemon is withdrawn.
Ultra Ball
An ultra-performance Ball that provides a higher Pokemon catch rate than a Great Ball.
TRAINERS
Union Cave is a twelve-trainer slog, Hikers and Ace Trainers stacked through its floors. The back-to-back fights wear your PP down well before the exit, so come stocked.
Ray
Union Cave Guide
A Level 20 Lapras turns up on B2F of Union Cave, in the southernmost pool, every Friday based on the system clock, and you need Surf to reach it. Miss it and it respawns the next Friday. This one knows Confuse Ray, Ice Shard, Water Pulse, and Body Slam.