It's awesome because he's not only a playable character, he's also a quest giver so he talks a lot. (stevivor.com)
Toad is not playable, so toadette is not playable.The only playable characters are the characters on mario power tennis except Koopa and Shy Guy and Mii is new. (mariopartylegacy.com)
The game initially introduces Masayuki Sanada as the only playable character and then gradually unlocks more characters as you progress through the story. (gearnuke.com)