Altering Cave

Altering Cave is located in Hoenn, and can be accessed from Route 103_2.

In order to access it, a player must buy an Altering Cave Ticket, which lasts 24 hours, for 600k from the salesman at the entrance.

Fishing in this area requires a fishing level of at least 45.

Wild Pokémon

Unlike other areas, Altering Cave's wild Pokémon level is equal to the average level of a player's party, rounded down.

Also unlike other areas, Pokémon in Altering Cave change everyday, as 2 Pokémon for every rarity and method are drawn from a pool of possible encounters.

And unlike other areas, wild Pokémon in Altering Cave does not drop any cash.

Common Pool

Pokémon	Method	Rate
		Normal Member	Gold Member
Butterfree	Walking	43.6%	40.41%
Beedrill	Walking	43.6%	40.41%
Pidgeot	Walking	43.6%	40.41%
Fearow	Walking	43.6%	40.41%
Golbat	Walking	43.6%	40.41%
Electrode	Walking	43.6%	40.41%
Beautifly	Walking	43.6%	40.41%
Exploud	Walking	43.6%	40.41%
Tentacruel	Fishing / Surfing	43.6%	40.41%
Gyarados	Fishing / Surfing	43.6%	40.41%

Uncommon Pool

Pokémon	Method	Rate
		Normal Member	Gold Member
Arbok	Walking	6%	9%
Sandslash	Walking	6%	9%
Gloom	Walking	6%	9%
Persian	Walking	6%	9%
Weepinbell	Walking	6%	9%
Krabby	Walking	6%	9%
Furret	Walking	6%	9%
Noctowl	Walking	6%	9%
Ledian	Walking	6%	9%
Ariados	Walking	6%	9%
Marill	Walking	6%	9%
Swellow	Walking	6%	9%
Pelipper	Walking	6%	9%
Masquerain	Walking	6%	9%
Shellos	Walking	6%	9%
Poliwhirl	Fishing / Surfing	6%	9%
Kingler	Fishing / Surfing	6%	9%
Seaking	Fishing / Surfing	6%	9%
Marill	Fishing / Surfing	6%	9%

Rare Pool

Pokémon	Method	Rate
		Normal Member	Gold Member
Venomoth	Walking	0.34%	0.51%
Primeape	Walking	0.34%	0.51%
Magneton	Walking	0.34%	0.51%
Muk	Walking	0.34%	0.51%
Hypno	Walking	0.34%	0.51%
Weezing	Walking	0.34%	0.51%
Jumpluff	Walking	0.34%	0.51%
Aipom	Walking	0.34%	0.51%
Sunkern	Walking	0.34%	0.51%
Quagsire	Walking	0.34%	0.51%
Misdreavus	Walking	0.34%	0.51%
Forretress	Walking	0.34%	0.51%
Dunsparce	Walking	0.34%	0.51%
Granbull	Walking	0.34%	0.51%
Smeargle	Walking	0.34%	0.51%
Mightyena	Walking	0.34%	0.51%
Lombre	Walking	0.34%	0.51%
Nuzleaf	Walking	0.34%	0.51%
Breloom	Walking	0.34%	0.51%
Ninjask	Walking	0.34%	0.51%
Skitty	Walking	0.34%	0.51%
Medicham	Walking	0.34%	0.51%
Volbeat	Walking	0.34%	0.51%
Illumise	Walking	0.34%	0.51%
Spinda	Walking	0.34%	0.51%
Cacturne	Walking	0.34%	0.51%
Chimecho	Walking	0.34%	0.51%
Drifloon	Walking	0.34%	0.51%
Carnivine	Walking	0.34%	0.51%
Chatot	Walking	0.34%	0.51%
Shellder	Fishing / Surfing	0.34%	0.51%
Horsea	Fishing / Surfing	0.34%	0.51%
Wooper	Fishing / Surfing	0.34%	0.51%
Qwilfish	Fishing / Surfing	0.34%	0.51%
Octillery	Fishing / Surfing	0.34%	0.51%
Crawdaunt	Fishing / Surfing	0.34%	0.51%
Luvdisc	Fishing / Surfing	0.34%	0.51%
Finneon	Fishing / Surfing	0.34%	0.51%

Very Rare Pool

Pokémon	Method	Rate
		Normal Member	Gold Member
Pikachu	Walking	0.05%	0.075%
Banette	Walking	0.05%	0.075%
Vulpix	Walking	0.05%	0.075%
Golduck	Walking	0.05%	0.075%
Cleffa	Walking	0.05%	0.075%
Cubone	Walking	0.05%	0.075%
Dewgong	Walking	0.05%	0.075%
Dodrio	Walking	0.05%	0.075%
Growlithe	Walking	0.05%	0.075%
Ponyta	Walking	0.05%	0.075%
Chansey	Walking	0.05%	0.075%
Tauros	Walking	0.05%	0.075%
Ditto	Walking	0.05%	0.075%
Xatu	Walking	0.05%	0.075%
Ampharos	Walking	0.05%	0.075%
Wobbuffet	Walking	0.05%	0.075%
Girafarig	Walking	0.05%	0.075%
Houndoom	Walking	0.05%	0.075%
Donphan	Walking	0.05%	0.075%
Magby	Walking	0.05%	0.075%
Miltank	Walking	0.05%	0.075%
Nosepass	Walking	0.05%	0.075%
Aggron	Walking	0.05%	0.075%
Murkrow	Walking	0.05%	0.075%
Manectric	Walking	0.05%	0.075%
Torkoal	Walking	0.05%	0.075%
Exeggcute	Walking	0.05%	0.075%
Flygon	Walking	0.05%	0.075%
Zangoose	Walking	0.05%	0.075%
Seviper	Walking	0.05%	0.075%
Absol	Walking	0.05%	0.075%
Lairon	Walking	0.05%	0.075%
Wynaut	Walking	0.05%	0.075%
Igglybuff	Walking	0.05%	0.075%
Luxray	Walking	0.05%	0.075%
Lunatone	Walking	0.05%	0.075%
Floatzel	Walking	0.05%	0.075%
Ursaring	Walking	0.05%	0.075%
Kadabra	Walking	0.05%	0.075%
Toxicroak	Walking	0.05%	0.075%
Yanma	Walking	0.05%	0.075%
Hariyama	Walking	0.05%	0.075%
Golduck	Fishing / Surfing	0.05%	0.075%
Slowbro	Fishing / Surfing	0.05%	0.075%
Staryu	Fishing / Surfing	0.05%	0.075%
Chinchou	Fishing / Surfing	0.05%	0.075%
Corsola	Fishing / Surfing	0.05%	0.075%
Mantine	Fishing / Surfing	0.05%	0.075%
Carvanha	Fishing / Surfing	0.05%	0.075%
Wailmer	Fishing / Surfing	0.05%	0.075%
Whiscash	Fishing / Surfing	0.05%	0.075%
Clamperl	Fishing / Surfing	0.05%	0.075%
Relicanth	Fishing / Surfing	0.05%	0.075%

Extremely Rare Pool

Pokémon	Method	Rate
		Normal Member	Gold Member
Bulbasaur	Walking	0.004%	0.006%
Charmander	Walking	0.004%	0.006%
Machoke	Walking	0.004%	0.006%
Farfetch'd	Walking	0.004%	0.006%
Onix	Walking	0.004%	0.006%
Rhyhorn	Walking	0.004%	0.006%
Kangaskhan	Walking	0.004%	0.006%
Scyther	Walking	0.004%	0.006%
Chikorita	Walking	0.004%	0.006%
Cyndaquil	Walking	0.004%	0.006%
Gligar	Walking	0.004%	0.006%
Heracross	Walking	0.004%	0.006%
Sneasel	Walking	0.004%	0.006%
Swinub	Walking	0.004%	0.006%
Skarmory	Walking	0.004%	0.006%
Elekid	Walking	0.004%	0.006%
Treecko	Walking	0.004%	0.006%
Torchic	Walking	0.004%	0.006%
Mawile	Walking	0.004%	0.006%
Numel	Walking	0.004%	0.006%
Spiritomb	Walking	0.004%	0.006%
Pinsir	Walking	0.004%	0.006%
Swablu	Walking	0.004%	0.006%
Duskull	Walking	0.004%	0.006%
Tropius	Walking	0.004%	0.006%
Snorunt	Walking	0.004%	0.006%
Spheal	Walking	0.004%	0.006%
Bagon	Walking	0.004%	0.006%
Turtwig	Walking	0.004%	0.006%
Chimchar	Walking	0.004%	0.006%
Bronzor	Walking	0.004%	0.006%
Gible	Walking	0.004%	0.006%
Munchlax	Walking	0.004%	0.006%
Hippopotas	Walking	0.004%	0.006%
Skorupi	Walking	0.004%	0.006%
Snover	Walking	0.004%	0.006%
Squirtle	Fishing / Surfing	0.004%	0.006%
Dratini	Fishing / Surfing	0.004%	0.006%
Totodile	Fishing / Surfing	0.004%	0.006%
Mudkip	Fishing / Surfing	0.004%	0.006%
Feebas	Fishing / Surfing	0.004%	0.006%
Piplup	Fishing / Surfing	0.004%	0.006%

Unique drops

Every Pokémon in Altering Cave has a small chance to drop the following items:

	Black Sludge
	Bright Powder
	Lagging Tail
	Quick Claw
	Rocky Helmet
	Shell Bell

Every Pokémon also has a very small chance to drop the following one-time, untradeable, unique items:

Altering Cave Scroll

Ancient Key (Loop Half)