The Golden Key is Mordred's gateway to another galaxy, hidden on a giant asteroid in the asteroid belt (X-11 Y-82). In order to pull the Golden Key, you must have defeated all three planets (Jungle, Fire, and Ice) and have the three 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.
You're not locked out until you pull the lever : go back in and pull it.
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.
To pull out the Golden Key, you must defeat all three planets (fire, ice, and jungle). (see the related question for the links)
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, the player, are the Chosen One when you arrive at the secret asteroid and must pull the Golden Key from the stone. If you don't have all three knights, you have wasted a trip. (See the related questions for help.)
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)
Go back in and pull it. The dungeon will not be guarded until you pull the switch and take the cheese.
You will need to defeat all three planets (jungle, ice, fire) and take all three space knights with you to the giant asteroid at X-11 Y-80, where you can pull out the Golden Key.
you go inside, get the moldy cheese and pull the lever down.
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.
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.