In the original series, Jadeite, Nephrite, Zoisite, and Kunzite were never revealed to be the loyal Four Heavenly Knights of Prince Endymion during the Silver Millennium nor were they romantically involved with the four Inner Sailor Guardians.
The Legendary Sacred Sword never appeared in the original anime.
Even though the five Sailor Guardians had teleported from Tokyo, they were facing the African continent when they reached space.
In the original series, Sailor Moon did not fly into Outer Space and heal frozen Tokyo with Moon Healing Escalation.