They are four Rocket Grunts that you may battle while in the Silph Co. building. They introduce themselves as a Rocket Brother, and once defeated they proclaim: "My brothers will avenge me!" Although, they are insignificant, and aren't necessary to battle.
Chat with our AI personalities
FLOOR 6,7,8,9
You have to beat the elite four and defeat team rocket for the last time on four island, get the sapphire, and give it to Celio.
The rocket team are not on four island. there are two grunts up a ways of Mt. Ember north of one island, however the Rocket Base is on five island. It requires two passwords if you want to enter. Work that bit out for yourself.
you can get it in four islands icefall cave after destroying team rocket there.search the cave ,it will be there
you have to catch 60 Pokemon first