Weevil

Best answer as chosen by Asker / Ratings
When you enter the dungeon, go to the left side of the room and get the Dungeon Map from inside the chest. Then go to the right side of the room, run past the Beamos, and exit to the next room.
Run past the Baby Dodongos and move the statue onto the floor switch. Kill the Lizalfos and continue until you get into the room with the Dodongos. You need to light all the torches with a Deku Stick to open the door. Then press the floor switch and go through the door that opens.
In the small room with the Armos (use the Bomb Flowers to destroy it), open the chest to get the Compass. Exit the room and put a Bomb Flower in the middle of the other Bomb Flowers to make stairs up to the upper floor.
In the room with the statues/Armos and Fire Keese, use your Slingshot to get rid of the Fire Keese, then stay near the edge of the room and find the statue with the ladder behind it. Pull this statue, climb up the ladder, and press the switch. Exit and continue.
In the room with lots of platforms (and spikes), jump forward and to the left, then climb the ladder with the block. Jump to the ledge with the Bomb Flower and throw it to the rock wall when it's about to explode.
Run past the Baby Dodongos to the room with more Lizalfos. Continue on until you're back into the room with the platforms and the moving spikes.
Now, jump across the ledges until you reach the chest to the right of the exit, and inside will be the Bomb Bag.