An 11-year-old Nobisuke Nobi from the past was mistaken to be Nobita by Gonsuke, who was ordered by Keria to bring him to the Beregamond Island. Nobisuke got lost in the jungles and accidentally used the Forgotten Stickon himself, which causes him to have amnesia. He saves the lives of Koron and her company. When being asked for his name he answered “What is it...?" (何だっけ Nandakke). Koron mistakenly thought that "Nan" (何) means "I", so she called him “Dakke”. Later, he, along with Gian and Suneo were attacked by an Elasmotherium. They were saved by Doraemon with the use of Decoy Robot. They are surprised that both Dakke and Nobita are lookalikes plus they have similar personalities. He helps Doraemon and company save the Island against Sherman and his team.