It shouldn’t be any surprise that the final two QR Yoshi colors for Mario Tennis Open are a Black Yoshi and a White Yoshi. While the White Yoshi has not been confirmed nor seen, White Yoshi accessories have been listed as unlockables in the game, making it very clear that he is the last QR character.
ADVERTISEMENT
What could that locked menu on the QR section of the Japanese site reveal? Will it be more characters? Stages? Let us know what you think it is in the comments below!
Source: The Bit Block and Mario Wiki