Where do you get the last boots from?

You get the boots underneat toad town. Use the lakitu guy to go over the spikes and get them.(if it doesn't work you need to kill all 3 of the bloopers and the super blooper).

Okay. To get the ultra boots, play through the game until you get the partner "Lakilester";
Who lets you fly over spikes and lava. Exit the level where you got him, go through the
Pipe that leads to the sewers in toad town. Spin jump on the thing that you butt drop on,
You will then drop through the ground and land in a lower part of the sewer. Go right, use
Sushi, (the fish) to swim across the body of water to the other side. ( You might have to
Fight blooper or something) go throgh the doorway and jump the big stair that you see when you enter this chamber. Jump the other one above this one. Then use Lakilester to fly across the spike field, then go throgh the pipe and then go to the grey block and smash it to gain acess to another chamber. Keep going left until you find a metal block. Destroy it, then you will see a trampoline thingy on a brick block. Destroy the brick block and use the trampoline to get over the wall. Open the big chest to get the ultra boots. Sorry this is so long.

Okay. To get the ultra boots, play through the game until you get the partner "Lakilester";
Who lets you fly over spikes and lava. Exit the level where you got him, go through the
Pipe that leads to the sewers in toad town. Spin jump on the thing that you butt drop on,
You will then drop through the ground and land in a lower part of the sewer. Go right, use
Sushi, (the fish) to swim across the body of water to the other side. ( You might have to
Fight blooper or something) go throgh the doorway and jump the big stair that you see when you enter this chamber. Jump the other one above this one. Then use Lakilester to fly across the spike field, then go throgh the pipe and then go to the grey block and smash it to gain acess to another chamber. Keep going left until you find a metal block. Destroy it, then you will see a trampoline thingy on a brick block. Destroy the brick block and use the trampoline to get over the wall. Open the big chest to get the ultra boots. Sorry this is so long.