Requirements needed evolution of collossio which is descomune (collossio evolves in lv50) and a monkoor (underwater is uncommon) and dig. now bring both and surf west from muddy island and find a diving spot dive down and fine a rock with a cornian code press a on it then dive in front of it then a cave appears. put monkoor on top and descomune on the last slot. use dig in frony of a wall saying that its different than the other ones use dig in front then it opens the go solve a puzzle that has invisible walls then if u reach the end read the cornian script and an earthquake happens which means you unlocked all caves.AREAS= MOLEBAS near the desert where mole ticket is needed. DUGOBAS= golden island surf north then left then north till u find an island with a cave. LAPIBAS=go to white port city and go left and enter the jungle until u find a large stone with stares and a cave spot. all appear at lv50 MOLEBAS=ROCK DUGOBAS=WATER LAPIBAS=ICE if u want more legendaries just ask me to. hope this helps