SonicMario
Star Spirit
Apparently the update also added an Easter Egg that allows you to knock on the door. And if you do it repeatedly. A Weird Mario will temporarily pop out and will be in a random power-up related to the game the level is currently based on. And it has Weird Mario in all the styles, so you could even see Weird Mario in NSMB format. (Though it's still only playable in 8-Bit)