I am at 95% complete and only need treasure 5. I know where it is located as I can see it, but cannot figure any way to get to it. I believe I have been all through the lower part of Tomba Island, but nothing seems to get me there. I have read the walkthrough and either something has changed since that was written, or I am totally lost. They mention a boss, but, again, I can't seem to find anyplace I have not been. Thanks in advance for your help.

Thanks. I started watching the video and I saw that I had missed a door at the upper left of the caves that led to the boss. I did not watch the entire video, so it is off to kill the boss.