Being the only undefeated women's champion in history is a huge accomplishment on it's own but Chyna's accomplishments go far beyond what any woman has ever achieved. She was the only woman to wrestle men on a regular basis. She was the first woman to ever enter the Royal Rumble and the only woman to qualify and advance in the King of the Ring, she was the only woman to hold number one contendership status for both the WWE World Heavyweight Championship and the WWE Intercontinental Heavyweight Championship. She also held the Intercontinental championship three times and qualified for number one contendership for the tag team championship twice. She fought and defeated the likes of The Rock, Triple H, Steve Austin and even went to battle against Kane, The Big Show and the Undertaker on multiple occasions.
After the WWE she went on to become the only woman to fight men in The New Japan Wrestling federation where she qualified for the IGP Tag Team Championships and became number one contender for the IGP Heavyweight championship where she did battle against Mashiro Chono. [photo source]