Koopa Troopa and Blooper are coming to Mario Tennis Aces as playable characters.
Nintendo shared the news during Treehouse Live today at E3. Players who participate in the July online tournament and earn enough points can unlock Koopa Troopa early. The character will then be made available to everyone via a free update on August 1.
Koopa Troopa in Mario Tennis Aces, via Nintendo on Twitter
Source: IGN.com Mario Tennis Aces Adding Koopa Troopa, Blooper to Roster