You need to enter the cave with Team Charm.
In Aegis Cave.
aegis cave
You have to go to Aegis Cave, But to get there you need to release manaphy into the sea and sleep for a few days and then team charm comes and takes you to Aegis Cave.
# 1)ice aegis cave 3fl # 2) regice # rock aegis cave 3fl # 3)regirock # steel aegis cave 4fl # 4)registeel # aegis cave pit 5fl # regigigas chamber :regigigas, 4hitmonlee and 4 bronzong 19 floors
you go to aegis cave in registeels room and you go to kick butt.
some time after you beat the game go to the second floor of the guild (where the swap shop is) the other guild members will be talking to team charm and team charm will let the guild members go to aegis cave.
aegis cave
In Aegis Cave
16
wait a few days and go to aegis cave with team charm
After Manaphy goes back into the sea, do at least one job and go to sleep three times. Then, you will go to the guild and everyone will be gone. Go to the bottom, and Team Charm will be there, and you will join them on an expedition in Aegis Cave. You have to battle Regice, Regirock, Registeel, and even Regigigas and his minions.
not as big as my penuis :D