The concept of Earth-Two allowed for parallel versions of DC’s heroes to have been active from their first appearances in the 1930s and 1940s — and for them to age accordingly. In 1971, the contemporary Robin (then in college) met his older Earth-Two counterpart, who began his career in 1940, and who first met the Justice League in 1967. The older Robin wore a Batman-Robin hybrid costume that was a bit of an eyesore, and the two sidekicks bonded over feeling underestimated by the more seasoned heroes. By the end of this story, the younger Robin had a snazzy new costume lent to him by the elder one. (Unfortunately, it was not a permanent change.) But the elder Dick died wearing the better costume in 1985 during a story line meant to eliminate the parallel worlds.