you have to beat thetelite 4 and then go somewhere on the battle frontier island.it is place clossest to mt.stark.
You can unlock Polyjuice Potion the second years in the story Potion's Classroom with Professor Snape. There is a glitch witch prohibit the ability to unlock. You can unlock the Polyjuice Potion by watching "Polyjuice Potion Intro" scene in movie theater on the second floor in "Leaky Cauldron. This unlock can result in another glitch that trap you in "Potion's Classroom" every time you want to visit Hogwarts. By restarting several times might undo the trap glitch. It's advised to export game save before you try to fix the "Polyjuice Poisson glitch".
After your second time going through the elite four he will be the Champion.
you have to get their phone numbers. after that, if you call them on a certain day at a certain time, they'll ask you to battle. go to psypokes.com for info on where to meet them.
The first time you battle her, she has a Musharna, a Reuniclus, a Gothitelle, and a Sigyliph. The second time onward, she has all of the above adding Metagross and Bronzong. By the way, all of her Pokemon are of the Psychic type.
first you have to beat all of the elite four then you go back to the start ,step on the statue and press A on it and it will take you to the bottom. you have to climb up some stairs then alder is there. if it is your first time beating the elite four N will be there battling alder and N wins. team plasma make their castle come out the ground and in to the poke league,N runs into the castle and you have to follow him.you will see all of the seven sages there and they want to battle you but all the gym leaders come and battle them for you.the further you advance you get closer to N before when you battle him ghetsis will be there and he lets you through, N brings out reshiram or zekrom depending on the game you have reshiran:black zekrom:white if you have white he sends out reshiram and then the black stone floats out of your bag and glows,zekrom comes out of the black stone and then you battle him if you catch him he becomes the leader of your party and the rest of your pokemons hp (health points) get restores to full life then N challenges you to a battle then if you beat him ghetsis comes in and then N restores your hp to full.ghetsis challenges you to a battle after you beat him N flys away on reshiram or zekrom. he flys away on reshiram for me because i have Pokemon white after he flys away you never see him again and ghetsis leaves the game to but the rest of the sages stay and give you tms every time you find them after you find one of them looker(the police officer of Pokemon diamond,peal and platinum) comes and arests them.and that's the end really oh yeah and one more thing you can challenge Cynthia in undella town the first house on the left of the piokemon center. a little tip she is hard and she has the same Pokemon as she did on the old games exept for one i cant tell you that it is a secret.
no only once
You can't. There is no way in Pokemon Gold, Silver, or Crystal to re-battle the gym leaders. The only Pokemon game that I've seen this in is the 3rd gen games (RSE).
When you find them out of their gyms the second time, talk to them and they'll give you their number. If you call them they say what day you can re-battle them. You'll re-battle them at the Dojo in Saffron City next to the Gym. When it is the day where you can re-battle them, go to the Dojo and they'll be there.
Yes, by pressing the Caps Lock key a second time it will unlock.
You only have one rival (or do you mean the second time you battle your rival?)
The second time he tried to invade the North - Gettysburg.
Yes, but you have to beat the Elite Four to battle it a second time.
no
Battle him a second time.
You can`t battle him twice like you can`t with other gym leaders
sadly, you can't in BW.
You don't unlock it. After you meet the boy the first time you go to the mall and they will be there, it is the same the second time.