Gen II Locations

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

Union Cave (B2F)

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

ConditionRarityGoldSilverCrystal
Time of day
In the morning 30% Zubat lv. 22 Zubat lv. 22 Zubat lv. 22
30% Raticate lv. 22 Raticate lv. 22 Golbat lv. 22
20% Golbat lv. 22 Golbat lv. 22 Zubat lv. 22
10% Geodude lv. 21 Geodude lv. 21 Raticate lv. 21
5% Rattata lv. 20 Rattata lv. 20 Geodude lv. 20
4% Onix lv. 23 Onix lv. 23 Onix lv. 23
1% Onix lv. 23 Onix lv. 23 Onix lv. 23
During the day 30% Zubat lv. 22 Zubat lv. 22 Zubat lv. 22
30% Raticate lv. 22 Raticate lv. 22 Golbat lv. 22
20% Golbat lv. 22 Golbat lv. 22 Zubat lv. 22
10% Geodude lv. 21 Geodude lv. 21 Raticate lv. 21
5% Rattata lv. 20 Rattata lv. 20 Geodude lv. 20
4% Onix lv. 23 Onix lv. 23 Onix lv. 23
1% Onix lv. 23 Onix lv. 23 Onix lv. 23
At night 30% Zubat lv. 22 Zubat lv. 22 Zubat lv. 22
30% Raticate lv. 22 Raticate lv. 22 Golbat lv. 22
20% Golbat lv. 22 Golbat lv. 22 Quagsire lv. 22
10% Geodude lv. 21 Geodude lv. 21 Raticate lv. 21
5% Rattata lv. 20 Rattata lv. 20 Geodude lv. 20
4% Onix lv. 23 Onix lv. 23 Onix lv. 23
1% Onix lv. 23 Onix lv. 23 Onix lv. 23
Statistics
Level range 20-23 20-23 20-23
Average EXP
per Pokémon		 318.9 318.9 327.75

Fishing with an Old Rod

RarityGoldSilverCrystal
70% Magikarp lv. 10 Magikarp lv. 10 Magikarp lv. 10
15% Magikarp lv. 10 Magikarp lv. 10 Magikarp lv. 10
15% Krabby lv. 10 Krabby lv. 10 Krabby lv. 10
Statistics
Level range 10-10 10-10 10-10
Average EXP
per Pokémon		 48.4 48.4 48.4

Fishing with a Good Rod

ConditionRarityGoldSilverCrystal
Time of day
In the morning 35% Magikarp lv. 20 Magikarp lv. 20 Magikarp lv. 20
35% Krabby lv. 20 Krabby lv. 20 Krabby lv. 20
20% Krabby lv. 20 Krabby lv. 20 Krabby lv. 20
10% Corsola lv. 20 Corsola lv. 20 Corsola lv. 20
During the day 35% Magikarp lv. 20 Magikarp lv. 20 Magikarp lv. 20
35% Krabby lv. 20 Krabby lv. 20 Krabby lv. 20
20% Krabby lv. 20 Krabby lv. 20 Krabby lv. 20
10% Corsola lv. 20 Corsola lv. 20 Corsola lv. 20
At night 35% Magikarp lv. 20 Magikarp lv. 20 Magikarp lv. 20
35% Krabby lv. 20 Krabby lv. 20 Krabby lv. 20
20% Krabby lv. 20 Krabby lv. 20 Krabby lv. 20
10% Staryu lv. 20 Staryu lv. 20 Staryu lv. 20
Statistics
Level range 20-20 20-20 20-20
Average EXP
per Pokémon		 231.88 231.88 231.88

Fishing with a Super Rod

ConditionRarityGoldSilverCrystal
Time of day
In the morning 40% Krabby lv. 40 Krabby lv. 40 Krabby lv. 40
30% Corsola lv. 40 Staryu lv. 40 Corsola lv. 40
20% Krabby lv. 40 Krabby lv. 40 Krabby lv. 40
10% Kingler lv. 40 Kingler lv. 40 Kingler lv. 40
During the day 40% Krabby lv. 40 Krabby lv. 40 Krabby lv. 40
30% Corsola lv. 40 Staryu lv. 40 Corsola lv. 40
20% Krabby lv. 40 Krabby lv. 40 Krabby lv. 40
10% Kingler lv. 40 Kingler lv. 40 Kingler lv. 40
At night 40% Krabby lv. 40 Krabby lv. 40 Krabby lv. 40
30% Staryu lv. 40 Staryu lv. 40 Staryu lv. 40
20% Krabby lv. 40 Krabby lv. 40 Krabby lv. 40
10% Kingler lv. 40 Kingler lv. 40 Kingler lv. 40
Statistics
Level range 40-40 40-40 40-40
Average EXP
per Pokémon		 701.4 693.4 701.4

Surfing

RarityGoldSilverCrystal
60% Tentacool lv. 15-19 Tentacool lv. 15-19 Tentacool lv. 15-19
30% Quagsire lv. 20-24 Quagsire lv. 20-24 Quagsire lv. 20-24
10% Tentacruel lv. 20-24 Tentacruel lv. 20-24 Tentacruel lv. 20-24
Statistics
Level range 15-24 15-24 15-24
Average EXP
per Pokémon		 346.35 346.35 346.35

Page last modified November 20 2025 at 17:59 UTC