The soldiers are looking for a fish thief who is one of the five men in the paper dragon. By talking with the men, determine their order inside the dragon and put them in that order (the three with hats are to the right). When you click on a pair, they change places. The guilty man (the one with a mustache but no glasses) was in the tail, and confesses. One soldier gives you his betting slip on the Sumo match, offering to split the proceeds.
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The island that has sumo-wrestling in it is the Red Dragon.
In the Sumo Wrestling match. Talk to the guy there and you'll give him the betting slip.
You take it to the sumo wrestling match.
The champion sumo (Yokozuna) is inside the sumo match place.
There is no "Sumo Island." The island that features ancient Japan and a sumo challenge is Red Dragon Island. (see the related question)
in the West Edo
you cant
Go to the sumo wrestling area
you go to the sumo match with the card the soldier gives you
You never play the betting slip. When you go to the Sumo competition, you take the place of the challenger and defeat the Yokozuna (champion). Since the betting slip was for him to win, your ticket is worthless, and so are the ones for the guards (who are justifiably upset).
How do I sign the autographs for the sumo wresler in red dragon island in poptropica