It's toward the end of the game on the level called 'Full Moon'. You will also need the Cardinal as your pet animal. It's about halfway through the level. -- You have to enter the first shanty shack you encounter on the right hand side, just before you climb your first ladder. The Cardinal will do the rest.
You either find them all and purchase some of them or hack the game.
In the Industrial Castle level after Pipistrello's Cave, there's a large enemy with the Cardinal Animal Orb. The Cardinal finds secret hidden items. With the Cardinal go to the Full Moon level after Medusa's Lair. The Cardinal will find and give you the key in the second hut just before you go to the Snow World Level. The Key Sword opens the last door in the Animal Ark and unlocks the Berserker animal (he gives you a magic boost).
Another animal called Berseker, he isn't really the best though. He gives you increased magic. To unlock it, pick up the cardinal from the Industrial Castle level and go to the Full Moon level to get the hidden Key Sword. Use the sword on the door to unlock it.
First, go to the Industrial Castle level and get the Cardinal. Then go to the Full Moon level and get about halfway through it to the two huts right before you get to the Snow World mission. The Cardinal picks up a sword shaped like a key. Use the key and hit the door. The lock falls off and you can go in.
it is in the Castle Trodain dungeon, which can only be unlocked after you get the key from the lady in the snow area.
in the castle in the gam
Actually its outside castle gam if you look in the cracks you might just see a key
for misson 2 it is behind one of the stones on castle gam
it is one!:)The third universal castle key is ...?
The dover castle. It is the largest castle in England.
find out 4 ur selfs dont count on me to do ur work for u
On most school districts sword key chains would not be legal to have in class.
it's in the astro belt at the bottom left coner area.you have to defeat the planets and have all the knights with you to get to the castle. once you have all the knights with you go to the astro belt then, go to the sword key and pull it out. after that you jump in the spining wheel thing.