Zordon and Alpha 5 in “The Mutiny, Part 3”

Rangers, you must face Pirantishead again. Call for the new Zords when you need them, and they will come. Tommy, your powers are too weak to support a new Zord. I'm sorry.

He can still morph, he just can't power a Zord. We'll keep trying to find a way to regenerate Tommy's powers, but right now, you've got to go and save Angel Grove and the world!