Donatello, Casey and others in “Unfinished Business”

I get it now. He said the only way to destroy the Black-hole generator is a combination of fusion and dark matter.

Which means?

The ship runs on dark matter and the Fugitoid is powered by a fusion core.

That's why he wanted us off the ship. He didn't want to steal it. He's...sacrificing himself.

NO! Fugitoid, don't do it!!

It has to be this way, my friends. If you had known my intent, you would have tried to stop me. And for that, I thank you. Let it be known, that you are my friends. And I love you all.