You must beat the elite four two times to get through.
AnswerOne that was here is a lie. If nothing works, and you are using an emulator(no matter which, just with GaneShark) you can use this code to pass walls. Do not use on Non-Existing patterns, because game will crash. You can travel on almost anything with that cheat. E03B0649 5D67050C 78DA95DF 44018CB4Please copy and paste. Made by LoadingNOW from GameFaqs.
the real answer is...If you have Pokemon leaf green or fire red than you have to go and get your new pokedex from professor oak first and the man will move out of the way.You must have beaten the Elite Four and Champion.
You go on to battle the champion Cynthia.
The Unknown Dungeon is located roughly in the same area as it did in the original Red and Blue. It is located on the other side of the river northeast of Cerulean City. To gain access, you must have beaten the Elite Four and your Rival, and watched the credit rolled.
The game does open after beating the Elite Four. You simply select Continue, and you will be back at your house after you have beaten the Elite Four and Champion. :3
You go to this one room where you face your enemy who also has beaten the elite four then you face him and if you win you become Pokemon champion
You can get it from Bebe (the house next to the Pokemon Center in Hearthome City) after you have beaten the Elite Four and Champion.
No, you do not have to catch all the Pokemon to encounter Mewtwo. Mewtwo can be found in Unknown Dungeon/Cerulean Cave in the first Generation games at the deepest part of the cave after beating the Elite Four and the Champion of Kanto.
Unfortunatly, yes you do. I haven't beaten the Champion yet and on Pokemon Diamond & Pearl, you can't migrate until you beat the Elite Four. Which I think is weird because you've already beaten the game.
You can catch Mewtwo at the Unknown Dungeon after beating the Elite Four and entering the Hall of Fame.
The only area that becomes accessible after defeating the Elite 4 is the Unknown Dungeon (Cerulean Cave), where Mewtwo can be found.
The best place for more experience is to repeatedly challenge the Elite 4 + champion.
Once you beat the Elite Four, and your rival, you become the Pokemon champion. You've pretty much beat the game. There's nothing more for you to do, other than explore the Unknown Dungeon in Cerulean City, and catch Mewtwo, and finish filling your Pokedex. He is lvl 70, so be prepared.