You first need to cut the bonsai trees so the person can come in and take a tree. Then go to the Wrestling match and have the betting slip. Sign the Autographs for the wrestler and then you can figure it out from there.
you buy it in store.
The island that has sumo-wrestling in it is the Red Dragon.
You don't have to open it. It is open already, and you could just go in.
The champion sumo (Yokozuna) is inside the sumo match place.
he is the person who gives you the haiku
For red dragon, help everyone else. This includes the kappa and fixing the bridge and bonsai trimming. Then go to the sumo match.
How do I sign the autographs for the sumo wresler in red dragon island in poptropica
You take it to the sumo wrestling match.
There is no "Sumo Island." The island that features ancient Japan and a sumo challenge is Red Dragon Island. (see the related question)
You can "fight" a sumo wrestler in Red Dragon island and on the free mini game inspired by the island.
you go to the sumo match with the card the soldier gives you
you have to use the moter on the red bridge so the sumos can get across