MELTY MONSTER GALAXY
36: The Magnificent Magma Sea:
When you reach the small planets that the magma monsters are all gobbling up, you can find the Comet Medal in the center, on the planet above the darker, long platform.
CLOCKWORK RUINS GALAXY
37: Time for Adventure:
Comet Medal is located on the first ramp of rolling stones, above the alcove with the 1UP hiding inside of it.
38: Return of the Whomp King:
Go to where the Wiggle is walking around a flagpole and then drop off the side and spin to land on the ledge below. Climb the pole there to get the Comet Medal.
BATTLE BELT GALAXY
39: Mini-Planet Mega-Run:
On the second planet, the one with the lava pools, the Comet Medal will be above one of them.
40: Jumpin Around in the Dark:
In the first section of the house, the medal will be in the very top left corner.
SLIMY SPRING GALAXY
41: The Deep Shell Well:
The medal is in a side tunnel on the left just after you grab the first koopa shell.
BOWSER’S GALAXY GENERATOR
42: Bowsers Fortified Fortress:
After you face the two magma monsters along the pink blocks, there is a medal to the left side of the blocks as they rise up. You’ll need Yoshi to grab it though.
MARIO SQUARED GALAXY
43: Make Mario a Star:
The Comet Medal here is on the far left side of the area. Grab it quick and get out of the corner as fast as you can.
44: The Rainbow Road Roll:
Stay to the right of the track, and when it splits to grab the medal.
TWISTY TRIALS GALAXY
45: Spinning and Spinning and Spinning:
Find the Comet Medal along the third to last block as it spins around. Chances are you’l just come across it as you complete the level.
STONE CYCLONE GALAXY
46: Silver stars on the Cyclone
This comet medal is located on a very fast moving block in the center of the area. You can use the button to slow down time to get it, or just time a jump really well while on the moving block.
BOSS BLITZ GALAXY
47: Throwback Throwdown:
For this comet medal, when you battle against King Kaliente, head to the underside and you will find it in the center there. Do a back flip and spin to grab it.
48: Wicked Wall Jumps
For this medal, things get tricky. When you see it on top of the blue walls, you will need to ignore it until you bounce up the walls after the spikes. Then you can long jump to the left and spin to pull the ledge out and jump over the gap again to grab the coin.