Answered May 2nd, 2019

Charles Barkley notches his first career 20/20 game with 26p/21r. He finished his career with 42 20/20 games.

When was the first time Charles Barkley had 20 points and 20 rebounds in a game?
Interpreted as:
When was the first time Charles Barkley had 20 or more points and 20 or more rebounds in a regular season game?