You cannot kill the ninjas!!
go to the ninjas house
There is no Samurai Island on Poptropica. The island that has ninjas and sumo wrestlers in ancient Japan is Red Dragon Island. (see related question)
You have to kill the monkey first.
To beat red dragon island, simply beat a red dragon. Don't forget to swallow.
you find it on red dragon island
in red dragon island
if you want this answer than you have to ask how do you beat red dragon island.
Red Dragon Island is out?!
There is no statue on Red Dragon Island. (see related question below)
when you turn pink while you are a dragon on red dragon island it is because your health is going down.
Get a team of adventurers and just kill that dragon.
you defeat the red dragon