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Goldbob makes his residence in Poshley Heights. Rather than take the train, you can return there via a warp pipe in the area beneath Rogueport. You'll find Goldbob in front of the blue house on the west side of town. When he asks how much you're willing to pay to use the cannon, answer "Everything I have!" then answer "Yes" to all of his subsequent questions. He won't actually keep your coins, but he will give you the Goldbob Guide.

General White is a bit more difficult to track down. You may remember seeing him in Petalburg. Head there from the blue warp pipe beneath Rogueport and talk to the Koopa near the west entrace. He'll point you to Keelhaul Key, so head to the shantytown and ask Pa-Patch for another clue.

Return to Rogueport and take the blimp to Glitzville. If you inquire with the juice-shop owner as to General White's whereabouts, he'll receall something about a big tree. That means the next stop on your whirlwind tour is Boggly Woods. The first Puni inside the Great Tree will tell you that White went somewhere dark.

Make your way back to Twilight Town and talk to the villager standing in front of the inn. It seems General White isn't there anymore (surprise!), so drag your dejected self back to Fahr Outpost. While you're reporting to the mayor that you haven't been able to find White, you'll see the general step out of the house in the background! Follow the elusive Bob-omb back inside and wake him up (you'll have to give it several tries).