Not unlike Major League Baseball, multiple series of trading cards were released featuring the Mighty Morphin Power Rangers.
During 1994 and 1995, Collect-A-Card released no fewer than TEN different series of trading cards. While many of the series share pictures/subjects, each individual series can be discerned by the blister packs the cards came in as well as the colors/patterns (or lack thereof) found on the borders of the cards.
Want to keep track of your cards? Check out the CardTracker!