When I was younger I actually told this to my friend.
Emerald: If you beat the elite 4 100 times and then go to mosdeep in the space center, the old man will give you a ticket called "Lunar ticket 0100" for your accomplishment. You would show that to one of the scientists and he would tell you that you better get on the rocketship because it would be departing soon. The screen flashes and you appear in a different room and then you wak into the rocket ship. You see a scene of you blasting off and then you land on the moon. On the moon there was this fountain filled with lunatone and solrock and there would stair leading into the center of the moon from the fountain. In the center of the moon there would be a path, leading to a teleporting circle. You would find light blue digglets, but you couldnt catch them. They would use teleport and whatever you threw at it would bounce back off. When you stepped on the transporting circle you would be floating in space. You could walk a few steps foward to see an aurora. It was like a rock, you couldn't go past it and you would hear that bumping sound when you walk foward, so it pretty much was a wall. When you pressed a a deoxys would apear and you got to battle it and catch it. My friend believed me and because of this he beat the elite 4 38 times uti l I told him it was fake.