I will add and delete some of these the moment I find longer extensions of them.

Smithy First Phase

Smithy Second Phase

Bowser's Rage

Wish of Princess

King of the Koopas

Bowletta Battle

Cackletta's Soul

Shadow Peach

Invincible Shadow Queen

We're Counting on You, Mario!

Final Battle with the Shadow Queen

Mutant Xenomorph Elder Princess Shroob

The Ultimate Show

Dark Star Core/In the Final

Sticker Star Bowser

Cardboard Bowser

Kersti's Plea

Cardboard Bowser Crumples

Antasma Battle

Adventure's End

 

Which one is your favorite?

Mine is Dark Star Core.