Win all the 8 gyms first. How dumb are you?
Go get your head checked
you beat the pokemon league and if youre talking about the one on victory road you have to get the national pokedex
he is in victory road.
once you get the national dex you can go back to victory road where the guy was blocking the secret cave you help the girl then in there there's a place where you can surf and voila
Beat the Elite Four and get the National Dex.
you have to get all eight badges from all the gym leaders.
you beat the pokemon league and if youre talking about the one on victory road you have to get the national pokedex
he is in victory road.
once you get the national dex you can go back to victory road where the guy was blocking the secret cave you help the girl then in there there's a place where you can surf and voila
Beat the Elite Four and get the National Dex.
first you have to beat the Pokemon league and get the national pokedex then go in victory road where the guy was blocking it it should be open go in go through the rest of the cave and you will come out at route 224
you have to get all eight badges from all the gym leaders.
in platinum after you have gotten national dex go to victory road in the room the guy was blocking and find and catch dewgong
Go into victory road. near the end, instead of going to the pokemon league, go the other way and there will be a cave. go through there to end up on rt.225 (where you catch shaymin if you have oak's letter). if you do this before you complete the sinnoh dex, a guy will be blocking the cave.
You have to complete the regular pokedex and obtain the national one. then the guy will leave and there will be a pokemon trainer, marley, who will team up with you to get to the end of the cave
The guy blocking the cave is Cyrus and he is in spear pillar after you meet him the first time but you need 7 badges to get to spear pillar
In which game?
a razor claw (you can find one in the extra part of victory road which a guy is blocking until you get the national pokedex)