His name is "Twilit dragon Argorok".
Argorok the Dragon
find the boss door in the north of the central room
When you beat the mid-boss, from the city in the sky.
The Sky Pillar is not in any city in Pokemon Ruby, Sapphire and Emerald. It is found in Route 131 a little east from Pacifidlog Town.
In the city of the sky on the very bottom level, there is a flying lizard mini boss. Beat him to get the double clawshots.
There is no "super clawshot" but there is a double clawshot which you can get after you defeat the mini-boss in the city in the sky. Hope this helps!
climb the vines up to the platform or see faq for more info i suggest ign guides
To the Sky by Owl City
You have to beat the sand guy or floating head dude then you have to have all the mirror shards and but them where they belong on the glass mirror thingy once you do that you should be at the shadow temple in the sky... that's it!!!!!!!
Jupiter was named after the Roman God Jupiter, god of the sky. He was the boss of the gods. In other words, the big guy.
Rayquaza.Also,you can get a challenge mission from Mewtwo challenging you at sky stairway and you get to reruit mew two
Undercover Boss - 2010 Sky Zone 5-15 was released on: USA: 14 March 2014