You know, I joked before about Daisy having a Final Smash where she yells "Hi, I'm Daisy", and then linked it to Kirby...
But if I'm being serious? The Mic Item from Kirby would actually be a cool item in Smash (It was an item in Kirby's Dream Land before it was a power-up in later games).
Also, it'd be funny seeing (and hearing) character yelling into a stage microphone.
Some examples, for fun.

:
HEY STINKY! -STINKY -STINKY -STINKY -STINKY |
WAHOO! -AHOO! -AHOO! -AHOO! -AHOO!

:
HYEEEEAAAAAAAAH! -YAAAH -YAAAH -YAAAH -YAAH

:
PIKA-CHUUUUU! -CHUUUU! -CHUUUU! -CHUUU! CHUUU!

:
YOU'RE TOO SLOW! SLOW! SLOW! SLOW! SLOW!

: *Original Mic Sound from KDL* |
DORYAA! -RYAA! -RYAA! -RYAA! -RYAA! |
POYO! POYO! POYO! POYO! POYO!


: *microphone feedback noise*

:
WOOMY! WOOMY! WOOMY! WOOMY! WOOMY!

:
EEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

:
FEEL THE BURN! BURN! BURN! BURN! BURN!

:
HYES! YES! YES! YES! YES! |
C'MON! C'MON! C'MON! C'MON! C'MON!