Union Cave HGSS · Johto Area

Gift, legendary and roaming Pokémon

Lapras Lv. 20 · One-off encounter · B2F

Only on Fridays, in the lowest basement of Union Cave (Surf needed). It returns every Friday until you catch it.

Wild Pokémon

1F

Walking in the cave encounter rate 10

Pokémon	Type	Lv.	Morning	Day	Night
SandshrewHG	Ground	6	30%	30%	30%
Geodude	RockGround	6	30%	30%	30%
Zubat	PoisonFlying	5–7	25%	25%	25%
RattataHG	Normal	4	10%	10%	10%
RattataSS	Normal	4–6	40%	40%	40%
Onix	RockGround	6	5%	5%	5%

Hoenn SoundMakuhita 20%, Lv. 5 Absol 20%, Lv. 6Play the Hoenn Sound radio channel (after the National Pokédex): replaces four 10% grass slots.

Sinnoh SoundChingling 20%, Lv. 5 Bronzor 20%, Lv. 6Play the Sinnoh Sound radio channel (after the National Pokédex): replaces four 10% grass slots.

Surfing encounter rate 15

Pokémon	Type	Lv.	Chance
Wooper	WaterGround	10–20	60%
Quagsire	WaterGround	10–25	40%

Fishing

Rod	Pokémon	Lv.	Chance
Old Rod	Magikarp	10	85%
	Goldeen	10	15%
Good Rod	Goldeen	20	60%
	Magikarp	20	40%
Super Rod	Goldeen	40	70%
	Magikarp	40	20%
	Seaking	40	10%

B1F

Walking in the cave encounter rate 15

Pokémon	Type	Lv.	Morning	Day	Night
SandshrewHG	Ground	8	30%	30%	30%
Geodude	RockGround	8	30%	30%	30%
Zubat	PoisonFlying	7–9	25%	25%	25%
Onix	RockGround	8	10%	10%	10%
RattataHG	Normal	6	5%	5%	5%
RattataSS	Normal	6–8	35%	35%	35%

Hoenn SoundMakuhita 20%, Lv. 7 Absol 20%, Lv. 8Play the Hoenn Sound radio channel (after the National Pokédex): replaces four 10% grass slots.

Sinnoh SoundChingling 20%, Lv. 7 Bronzor 20%, Lv. 8Play the Sinnoh Sound radio channel (after the National Pokédex): replaces four 10% grass slots.

Surfing encounter rate 15

Pokémon	Type	Lv.	Chance
Wooper	WaterGround	10–20	60%
Quagsire	WaterGround	10–25	40%

Fishing

Rod	Pokémon	Lv.	Chance
Old Rod	Magikarp	10	85%
	Goldeen	10	15%
Good Rod	Goldeen	20	60%
	Magikarp	20	40%
Super Rod	Goldeen	40	70%
	Magikarp	40	20%
	Seaking	40	10%

B2F

Walking in the cave encounter rate 15

Pokémon	Type	Lv.	Morning	Day	Night
Raticate	Normal	22	30%	30%	30%
Zubat	PoisonFlying	22	30%	30%	30%
Golbat	PoisonFlying	22	20%	20%	20%
Geodude	RockGround	21	10%	10%	10%
Rattata	Normal	20	5%	5%	5%
Onix	RockGround	23	5%	5%	5%

Fishing at nightStaryu Good Rod · 10%, Lv. 20 Staryu Super Rod · 30%, Lv. 40Replaces one Good Rod slot and one Super Rod slot from 20:00 to 3:59.

Hoenn SoundMakuhita 20%, Lv. 22 Absol 20%, Lv. 22Play the Hoenn Sound radio channel (after the National Pokédex): replaces four 10% grass slots.

Sinnoh SoundChingling 20%, Lv. 22 Bronzor 20%, Lv. 22Play the Sinnoh Sound radio channel (after the National Pokédex): replaces four 10% grass slots.

Surfing encounter rate 15

Pokémon	Type	Lv.	Chance
Tentacool	WaterPoison	10–20	60%
Quagsire	WaterGround	15–25	30%
Tentacruel	WaterPoison	15–25	10%

Fishing

Rod	Pokémon	Lv.	Chance
Old Rod	Magikarp	10	85%
	Krabby	10	15%
Good Rod	Krabby	20	50%
	Magikarp	20	40%
	Corsola	20	10%
Super Rod	Krabby	40	60%
	Corsola	40	30%
	Kingler	40	10%

Chances are the game’s encounter slots: grass and caves 20/20/10/10/10/10/5/5/4/4/1/1, with every slot changing by time of day (morning 4:00–9:59, day 10:00–19:59, night 20:00–3:59); surfing 60/30/5/4/1; all three rods 40/30/15/10/5; Rock Smash 80/20; Headbutt 50/15/15/10/5/5. HG and SS mark Pokémon found in only one version. Where to find every Pokémon.

Trainers

Trainer	Pokémon	Prize	Where
HikerDaniel	Onix 11	₽352	1F
HikerRussel	Geodude 4Geodude 6Geodude 8	₽256	1F
FirebreatherBill	Koffing 6Koffing 6	₽192	1F
FirebreatherRay	Vulpix 9	₽288	1F
Poké ManiacLarry	Slowpoke 11	₽704	1F
HikerPhillip	Geodude 23Graveler 25	₽800	B1F
HikerLeonard	Geodude 23Machop 25	₽800	B1F
Poké ManiacAndrew	Marowak 24Marowak 24	₽1,536	B1F
Poké ManiacCalvin	Kangaskhan 26	₽1,664	B1F
Ace TrainerNick	Charmander 26Squirtle 26Bulbasaur 26	₽1,560	B2F
Ace TrainerGwen	Eevee 26Flareon 22Vaporeon 22Jolteon 22	₽1,320	B2F
Ace TrainerEmma	Poliwhirl 28	₽1,680	B2F

Prize money is four times the level of the trainer’s last Pokémon times the trainer class’s rate (doubled in double battles). Trainers who give you their Pokégear number call when they want a rematch, with stronger teams as you progress.

Items

Hidden items can be found with the Dowsing MCHN Pokégear app.

Tips

• Lapras (Lv20) appears in the southernmost pond on B2F only on Fridays, and you need Surf to reach it.
• TM39 Rock Tomb lies on B1F, west of the stairs down from 1F.
• Sandshrew lives here only in HeartGold, while Rattata is much more common in SoulSilver.
• Onix appears on every floor, at 5–10% depending on the floor.
• Surf the ponds on 1F and B1F for Wooper (60%) and Quagsire (40%).
• The B2F Ace Trainers Nick, Gwen and Emma use Pokémon in their 20s, so come back later if your team is still young.

More pictures