Your user name gives the impression that you won't be hanging around once you have an answer. Anyway, pop on down to gamefaqs.com.

Fancy doing my art coursework?

I am stuck wrote:
> i cant get into submegred castle can anyone help

Use your Pikmin. Although if Olimar could carry the treasure, you wouldn't need them. Useless bunch of retards. At least you're MEANT to sacrifice the white ones.