There are plenty of multimedia franchises that have made an impact, but none have quite reached the heights of Pokémon. The Japan-based series has accumulated over $88 billion in sales, serving as the highest-grossing franchise of all time (License Global). It can thank its sales to its diverse range of media - video games, trading cards, and other physical merchandise all help drive these sales. Of course, one area where the series finds success is through clothing, specifically T-shirts.