In the asteroid belt, at X-11 Y-82. (This is in the lower left of the solar system.)
You must have completed all three planets (jungle, ice, and fire) and have all three knights with you before going to the secret asteroid.
When you have beaten all three planets and have all 3 knights with you, travel to the giant asteroid at X-11 Y-84 in the asteroid belt. There you can pull out the Golden Key and enter the realm of the Binary Bard.
It is in the asteroid belt near the coordinates X-11 Y-84. *You cannot remove the Golden Key on the asteroid until you have defeated the three planets (jungle, fire, and ice) and have all three of the space knights with you.
The three knights tell of a mysterious planetoid in the asteroid belt, where a portal to another galaxy exists. Travel to the asteroid belt and to X-11 Y-82, where you can pull the Golden Key and find the Princess.
You have to beat all three planets : fire, ice, and jungle, and then return with the three knights to the mystery asteroid and pull the Golden Key. (see related question)
The asteroid with the Golden Key is in the asteroid belt at X-11 Y-82. (This is in the lower left of the solar system.) You must have completed all three planets (jungle, ice, and fire) and have all three knights with you before going to the secret asteroid.
if you mean the planet in the asteroid belt then it is X:11 Y:82
The giant asteroid is at X-11 Y-84, but you can only remove the Golden Key when you have beaten all three planets and have all three space knights with you.
Travel to the giant asteroid at X-11 Y-82 to battle the Bard and save the Princess. You will need all three knights to pull the Golden Key and reach the other galaxy.
It is at X-11 Y-84 in the Asteroid Belt. You can only go there after you have defeated all three of the planets (Jungle, Fire, and Ice) and have all three Space Knights with you, so that you can open the portal behind the Golden Key.
Yes, and the portal to the other galaxy is the Golden Key on the giant asteroid at X-11 Y-84 in the belt. You will need to beat all three planets (jungle, fire, ice) and have all three space knights with you to pull out the Golden Key.
As you defeat the three planets (jungle, ice, fire), the knights come along with you. So you have to beat all three planets to get all three knights. When you have them, go to the giant asteroid in the asteroid belt, near X-11 Y-84.
When you have all three knights with you, they suggest you look for a giant asteroid, which happens to be at X-11 Y-82 in the Asteroid Belt.