Wouldn't say we "need" the voices for the bosses like Lancer, King, Jevil, Queen, or Spamton; I'm more than happy to do those myself; but if you think you have a very standout voice for the characters then give something here and have fun putting energy into it!
Lancer- Rubber ball boi
I'm... The bad guy!
It crushes people to death, i think
Now I'm the Dad!!!
King- The big boy is here
(menacing) I'm... the bad guy.
Quiet people really piss me off
(soft and caring) My son is... a bouncy little pumpkin.
Jevil- Clown goblin
The key! The key! A marvelous fun is about to break free!
Uee Hee Hee! Shark-to-shark! I wouldn't have it any other way!
Queen- [Insert queen deltarune laugh]
It seems you are going to kick [my ass]
Hey nice face
I am going to be your wacky roommate now!
Spamton- Alex Rochon 100%
I have just the thing you need. It's... [Hyperlink blocked]
I used to be nothing but the email guy, now I'm the [It burns! Ow! Stop! Help me! It Burns!] guy!
(threatening, big, and a bit alien to his normal voice) KRIS KRIS KRIS KRIS I NEED YOU TO BE BIG WITH ME VERY VERY BIG SO BIG WE'LL STAND UP TALL AND SEE PAST THE DARK