Buried Relic

Final Floor: B99F
Unlock Method: Talk to Shiftry after completing Stormy Sea
Initial Level: -
Maximum Teammates: 3
Items: Yes
Check Map: No
Opponents Able to Join: Yes

The walls of this dungeon contain various Vitamin items for you to find it you pass through or destroy them.
At the end of this dungeon, you will find a reward room where you will receive a Friend Bow, 8 Evolution Crystals and 4 Deluxe Chests

After defeating Kyogre in Stormy Sea, you'll learn through a letter in the mail a few days afterwards, of the Buried Relic where Mythical Pokémon are seen. After speaking to Lombre and then to Shiftry, the cave opens up. On Floor 15 you will find Regirock. Defeat it first time and you'll get the Rock Part which is used to make the Music Box. On your second encounter, you will be able to recruit Regirock if you have the Ancient Relic Camp area from Wigglytuff

After defeating Kyogre in Stormy Sea, you'll learn through a letter in the mail a few days afterwards, of the Buried Relic where Mythical Pokémon are seen. After speaking to Lombre and then to Shiftry, the cave opens up. On Floor 25 you will find Regice. Defeat it first time and you'll get the Ice Part which is used to make the Music Box. On your second encounter, you will be able to recruit Regice if you have the Ancient Relic Camp area from Wigglytuff

After defeating Kyogre in Stormy Sea, you'll learn through a letter in the mail a few days afterwards, of the Buried Relic where Mythical Pokémon are seen. After speaking to Lombre and then to Shiftry, the cave opens up. On Floor 35 you will find Registeel. Defeat it first time and you'll get the Steel Part which is used to make the Music Box. On your second encounter, you will be able to recruit Registeel if you have the Ancient Relic Camp area from Wigglytuff