It is in the same place as the one in Ruby and Sapphire.
Fly in middle of the room
You can get a Rigisteel on Pokemon Emerald in the Ancient Tomb,which is on Route 120.But you need to unlock the Rigi's before you can attempt this.
You can't. you have to trade from Pokemon ruby sapphire or emerald. It resides in the ancient tomb on route 120
Yes it can be found in sealed chamber, desert ruins, ancient tomb and island cave.
Ancient tomb, Desert ruins, Island cave.
ancient tomb, desert ruins or something like that, and some kind of ice place
Desert ruins, Ancient tomb, Island cave, Sky pillar, Cave of origin, Marine cave, Terra cave.
The legendary pokemon are located in: Cave of Origin, Sky Pillar, Desert Tomb, Island Tomb, Ancient Tomb.
Yes, you can find Regirock in Desert Ruins, Regice is in Island Cave (Route 105), Registeel is in Ancient Tomb (Route 120)
Regice: Island Cave (route 105) Regirock: Desert Ruins Registeel: Ancient Tomb (route 120)
Let me tell you where you can find all the Regis in Pokemon Emerald. Regirock: You can find Regirock in the Desert Ruins; I dunno where exactly it is. Regice: You can find Regice in Island Cave, which is in Route 105. Registeel: You can find Registeel in the Ancient Tomb, which is in Route 120. Hope I helped :)
The braille in Registeel's tomb on Poké Emerald says: "those who inherit our will, shine in the middle", which means use the HM move flash in the center of the the tomb.