You can find a batch of details from Game Informer that pertain to New Super Mario Bros. U on the Nintendo Wii U below. There are details about the 3 different baby Yoshis and full grown Yoshi plus there are some details about Boost Rush Mode.
- Three Yoshi variations
- Pink Yoshi: inflated with a GamePad/Wiimote shake
- This can take Mario even higher than the flying suit can
- Pink Yoshis don’t help in horizontal movement
- Large surface area useful for collecting a bunch of airborne coins
- Gold Yoshi: shake the controller to light up the immediate area
- Also stuns nearby enemies
- Gold Yoshis show up in the Fire Snake Caverns
- Blue Yoshi: can shoot bubbles
- Can ride the adult version of Yoshi in numerous levels
- Yoshi can still eat breaks
- Collect five to fill a meter
- This rewards Yoshi’s rider with a power-up
- Camera pans out a bit in co-op
- This helps you see hidden star coins and pipes that you normally wouldn’t come across in single-player
- Boost Mode: Place up to four floating platforms at a time
- Use the GamePad touch screen in Boost Mode to pop friends out of bubbles, stun enemies, make it easier to reach the flagpole, manipulate environmental objects, swat Paratroopas
- Turn on Boost Mode by powering up the GamePad – that’s it
- Players will go through pre-selected packs of levels in Boost Rush Mode
- Collecting coins makes the auto-scroll faster
- Limited amount of lives given at the start of each pack
- Dying doesn’t reset the clock