https://www.gamespot.com/articles/pokemon-game-sales-pass-300-million-units/1100-6455215/

Following the release of Pokemon Ultra Sun and Moon this month, the Pokemon franchise has now crossed a massive new sales milestone. The Pokemon Company announced today that the monster-catching series has now passed 300 million games sold worldwide since the series debuted more than 20 years ago.

The sales are spread across 76 games released in the time between 1996 and 2017, running from the first games--Pokemon Red/Green--to Ultra Sun and Moon.