Where do you find rank 1 in mega-man battle network 3 white version

Rank 1 is Serenade, king of the Undernet. He is found in Secret Area 3, once you have all 200 standard chips. This is only available after you have beaten Alpha. If you're just looking for GigFreez, go to the Ura Inn hot spring, approach the rock wall, and go down the elevator.