Secret Archipelago

Amount of Floors - 30F
Unlock Criterea - Complete Weird Mountain
Notes - Pokémon are identical to ones you'll see in the Pokémon Village
Boss - Mewtwo
 

Pic No. Name Floors Found on
#422 Shellos 1F,4-5F,8-9F
#083 Farfetch'd 1-7F
#079 Slowpoke 1-10F
#213 Shuckle 1-10F
#287 Slakoth 1-10F
#304 Aron 1-10F
#322 Numel 1-10F
#422 Shellos 2-3F,6-7F,10F
#399 Bidoof 4-13F
#446 Munchlax 7-15F
#203 Girafarig 8-22F
#215 Sneasel 10-20F
#355 Duskull 10-22F
#080 Slowbro 11-20F
#128 Tauros 11-20F
#288 Vigoroth 11-20F
#305 Lairon 11-20F
#068 Machamp 14-19F
#423 Gastrodon 18F,21-22F,25-26F,29F
#400 Bibarel 18-24F
#115 Kangaskhan 18-29F
#423 Gastrodon 19-20F,23-24F,27-28F
#143 Snorlax 19-28F
#461 Weavile 19-29F
#186 Politoed 21-29F
#199 Slowking 21-29F
#289 Slaking 21-29F
#306 Aggron 21-29F
#323 Camerupt 21-29F
#358 Chimecho 23-25F
#477 Dusknoir 27-29F
#385 Jirachi 28F
WiiConnect24 Event Only
#487 Giratina 29F
Wonder Mail W Event Only
#150 Mewtwo 30F