Time Hole (to past)/ Super Mario Bros. Underwater
Shroob Castle
Battle
Victory!
Dark Dungeons
Shroob Castle
Serious Trouble
Spaceship Battle
Princess Shroob Battle / Overture to the End
Prince Bowser
Shroobs!
DESTROY!!
Elder Princess Shroob Battle / Overture to the End
Mutant Xenomorph Elder Princess Shroob / Final Battle
The Time Machine
Shrowser (this is not a final boss battle, it is actually an avoidence minigame)
Bye-Bye, Babies!
Old Ending
Credits
The End (Japan and PAL Only)
Which one is your favorite?