Help!!! Islands!

[PsychoAnime]

I've beaten the Elite Four and I know I am supposed to talk to the 2 Rocket's in Island 1 to battle them and open a new cave, but when I talk to them, they won't battle me! I know I am supposed to talk to some guy but I don't know who.

Please tell me how do I get them to battle me. Thanks.

[Happy Dude]

after you beat the elite 4 go to island 1 and go to the guy near the machine and talk to him. now go to team rocket and they will let u through

[PsychoAnime]

It seems I forgot to get the National DEx, well, crisis solved! :P