Billy is inspired by Trini's uncle Howard - a brilliant scientist and expert in martial arts.
Did You Know?
Zordon claims Rita wants to use the "invisibility" formula to make the Power Rangers disappear forever. This makes no sense at all. All the formula does is makes someone invisible, and only temporarily, as demonstrated by Uncle Howard at the end scene. It would make more sense if Rita was trying to get the formula to make her monsters invisible. See more