Where do you fight bowser in Mario 64 ds?

Answer 1

When we start up the game, we should be on the sandy part of the greenlands facing the castle. We run towards the castle and go inside. If we haven't Beaten Bowser in the Dark world, we shall go and beat him now (he is in the castle door with a huge star on it to the left of the big stair way up to the door that leads to the tower). Once we have the key, we should end up back in the castle standing on the big sun. On the sides of the stair way, Leading up to the door that leads us to the tower, there are two wooden doors (without Stars on them). We go into either one of them. If we have 15 or more stars, a big boo should be there. We run up to it, And it should float away to a door. We DON'T follow it, and go the opposite way. We shall go down those stairs and to the door with a keyhole. Now we know what the key is for. Anywho, the key should go in auto-maticly, and we gained access to the underground! Before we go anywhere, we need to be Mario. If not, We need to go back and get him*. Once we are Mario, we go to the Left. There should be a star Similar to the one where we battled Bowser in the darkworld.It should say how many stars you need to get in. We then need to go and get some more stars. When we get enough stars, we can go in. There Should be a big blue blobby thing. We go in there and complete the level Bowser's Sub. Once we get out, The blob thing should move back, revealing a block in the ground with a hole in it. Then, We go down the hole, and Enter...

BOWSER IN THE GREAT FIRE SEA!!!

*Note: To get Mario, on the Right side of the castle's Entrance stairs, There is a room with a Star with a "1" on it. Enter it, And there should be Four doors. One, A Red "M", A green "L", A Yellow "W" and the final door has nothing above it (Catch all seven of the silver rabbits). Go into the middle door (The one that Has no Keyhole) and Into the Rec Room. In the Back of the room, There is a door with a star with an 8 in the Middle. Enter it, and the is a room with a Mario painting. Enter it, and Defeat the goomboss to get the key to EXIT THE BATTLE TO GET OUT OF THE ROOM TO LEAVE THE REC ROOM TO OPEN THE DOOR TO GET MARIO!!!!!!! YEAH!

Answer 2

In the Dark World. It is the world where you end up if you go thru ANY of the doors with a huge star, and then fall into the hole.

Answer 3

The same way you do any other time, grab him by the tail and throw him at the bombs.

Answer 4

on the 1st ,3rd floor and basement