Get the Fourth Element and Smithy Return

After that all the Yoshi Tribe's are Cheering that their leader has been saved

Chief Yoshi: Thank you for saving me, Mario and friends. It's been an Honor seeing you again.

Mario: You're welcome. Hope you be save.

Chief Yoshi: I will. Thank you, Heroes. Thank you for save me.

They nod at him and he and his Tribe's left the Ice World

Luigi: Hope we'll see them again.

Peach: We will someday.

Daisy: Come on. Let's go ring that Bell.

Ace: Alright, Doc.

They ring the Bell and they got the 4th Element

Stuffwell: We finally got it. Time for us to head back to the Star Observatory.

They are heading to Warp Pipe to the Star Observatory and they finally made it back