Before turning on the Power, insert Konami's recently released "Kessakusen! Ganbare Goemon 1+2" (Gameboy Advance) into the DS, along with the new "Ganbare Goemon: Toukai Douchuu Daiedo Tenguri" (DS). Now, at select locations throughout the game, various characters from the GBA game will appear! Speak to them for some interesting dialogue or perhaps even more...?!

Note: These NPCs will only appear while you have the GBA Goemon 1+2 cartridge in the DS.