He-Man and She-Ra
"By the Power of Grayskull!" Fans of the early '80s "Masters of the Universe" cartoon will remember He-Man as he transformed from the mild-mannered Prince Adam into a muscular hero, and the toy came complete with a snap waist for realistic punching action. The release in '85 of a line of accompanying "Princess of Power" She-Ra toys gave girls their own gender-specific way to join in the fun and help protect Castle Grayskull from the evil Skeletor and his henchmen. Bonus points if you had your very own He-Man or She-Ra dress up kit, complete with Power Sword or Sword of Protection, which you proudly held overhead as you proclaimed, "I have the power!" -- just like your animated heroes.
Where They Are Now: The toys resurfaced in updated versions in the early 2000s, and a line of Masters of the Universe Classics toys plays homage to the originals. DC Comics currently publishes a comic book based on the characters, and as of late 2014 a new feature film was in production.