I apologize for the attitude first off. And secondly, I guess I haven't searched Dark Woods Temple (Level 5) enough to find the Hammer as Cosmo just confirmed it's needed to enter Level 6. Come to think of it, I didn't find the Map either, I only found the Compass, Whistle and the Boss, and the bonus heart container. Maybe I should try bombing and/or walking through some more walls? In Level 5 (Dark Woods Temple), I mean.
Well//! need to tell you this, so you can save some time!!
hammer is at a mini dungeon at the dark world (dark secret) -- need the flute to get it
from level 5 go up ,,, right - and up all the way walk up that wall you'll see a pool with no fairy
(think is a shop om the light world or so..., hammer is there I saw it, before posting this to ya!!