Gen IV Locations

Search a location with the box below to see a comprehensive table of possible Pokémon encounters in this location.

Union Cave (B1F)

Where?

Between Violet City and Azalea Town, more easily accessed from the latter; just walk out the eastern side of town across Route 33 and the entrance is near the top right corner.

From there, you can get to B1F if you walk up past the pond, then head all the way left to the left wall, surf across the pond below and go down the stairs on the right. Then surf across the pond on the right and go down the further stairs on the right end of that room, and you're on B2F.

Notes

On Fridays, you can find a Lapras (level 20) deep inside the cave. This is not a one-time event; there's a new one every Friday regardless of whether you've already caught or defeated one before.

To get to it, simply follow the instructions to B2F above, then surf into the water below you and head downwards until there's a low bank on the left side. Get off there and head down on the left until there's a lake on the right side. The Lapras will be swimming around in the middle of this lake.

How to read this table

The bolded horizontal headings stand for the main condition that affects the following slots; the big cells on the left side describe which circumstances must apply for the rows they span to be active. The percentages tell you the chance of a Pokémon from this slot (row) appearing for any given wild encounter, provided the condition on the left holds. Each condition (i.e. each bolded horizontal heading) always has the same number of slots actually active.

If all this confuses you, and I don't blame you, just set the conditions in the form above to what actually applies for you right now, which will hide all the inactive slots and leave only the Pokémon you're actually going to be seeing. This will also recalculate the statistics at the bottom of the table accordingly.

Walking in tall grass or a cave

ConditionRarityHeartGoldSoulSilver
-
Always 20% Geodude lv. 8 Geodude lv. 8
20% Sandshrew lv. 8 Rattata lv. 8
Radio
Radio off 10% Geodude lv. 8 Geodude lv. 8
10% Sandshrew lv. 8 Rattata lv. 8
10% Zubat lv. 7 Zubat lv. 7
10% Zubat lv. 7 Zubat lv. 7
Hoenn radio 10% Absol lv. 8 Absol lv. 8
10% Absol lv. 8 Absol lv. 8
10% Makuhita lv. 7 Makuhita lv. 7
10% Makuhita lv. 7 Makuhita lv. 7
Sinnoh radio 10% Bronzor lv. 8 Bronzor lv. 8
10% Bronzor lv. 8 Bronzor lv. 8
10% Chingling lv. 7 Chingling lv. 7
10% Chingling lv. 7 Chingling lv. 7
-
Always 5% Onix lv. 8 Onix lv. 8
5% Onix lv. 8 Onix lv. 8
4% Zubat lv. 9 Zubat lv. 9
4% Rattata lv. 6 Rattata lv. 6
1% Zubat lv. 9 Zubat lv. 9
1% Rattata lv. 6 Rattata lv. 6
Statistics
Level range 6-9 6-9
Average EXP
per Pokémon		 95.25 85.68
Average effort
per 100 encounters		 6 HP
13 Attack
63 Defense
16 Speed
6 Special Attack
 6 HP
13 Attack
40 Defense
40 Speed
6 Special Attack

Fishing with an Old Rod

RarityHeartGoldSoulSilver
40% Magikarp lv. 10 Magikarp lv. 10
30% Magikarp lv. 10 Magikarp lv. 10
15% Magikarp lv. 10 Magikarp lv. 10
10% Goldeen lv. 10 Goldeen lv. 10
5% Goldeen lv. 10 Goldeen lv. 10
Statistics
Level range 10-10 10-10
Average EXP
per Pokémon		 47.5 47.5
Average effort
per 100 encounters		 15 Attack
85 Speed
 15 Attack
85 Speed

Fishing with a Good Rod

RarityHeartGoldSoulSilver
40% Magikarp lv. 20 Magikarp lv. 20
30% Goldeen lv. 20 Goldeen lv. 20
15% Goldeen lv. 20 Goldeen lv. 20
10% Goldeen lv. 20 Goldeen lv. 20
5% Goldeen lv. 20 Goldeen lv. 20
Statistics
Level range 20-20 20-20
Average EXP
per Pokémon		 213.0 213.0
Average effort
per 100 encounters		 60 Attack
40 Speed
 60 Attack
40 Speed

Fishing with a Super Rod

RarityHeartGoldSoulSilver
40% Goldeen lv. 40 Goldeen lv. 40
30% Goldeen lv. 40 Goldeen lv. 40
15% Magikarp lv. 40 Magikarp lv. 40
10% Seaking lv. 40 Seaking lv. 40
5% Magikarp lv. 40 Magikarp lv. 40
Statistics
Level range 40-40 40-40
Average EXP
per Pokémon		 563.7 563.7
Average effort
per 100 encounters		 90 Attack
20 Speed
 90 Attack
20 Speed

Surfing

RarityHeartGoldSoulSilver
60% Wooper lv. 10-20 Wooper lv. 10-20
30% Quagsire lv. 15-25 Quagsire lv. 15-25
5% Quagsire lv. 10-20 Quagsire lv. 10-20
4% Quagsire lv. 10-20 Quagsire lv. 10-20
1% Quagsire lv. 10-20 Quagsire lv. 10-20
Statistics
Level range 10-25 10-25
Average EXP
per Pokémon		 213.2 213.2
Average effort
per 100 encounters		 140 HP
 140 HP

Page last modified January 26 2021 at 23:17 UTC