2) What are some general tips. I think I've got the powersliding down pat (very similar to Mario Karts). But are there things you can do like in MK when doing jumps and performing tricks for extra boosts? And how do you get the speedboost at the start of the race?
Powerstart is done in 1-3 steps. You have to press the accelerate button when the screen goes dark as the announcer shouts ready, 3, 2
Powersliding can be done in one direction, then you let go the brake button for an instant, change direction then press it again to keep your powerslide in the opposite direction. This is used when you get a set of very tight turns and you don't want to use/lose the boost until after them.
When transforming to car or boat you can do one or several tricks to get a transformation boost.
EDIT: Another trick I learned here:
When the turns are super ultra tight, as you are powersliding start tapping the accelerate button and you could even consider letting go for a short while in order to avoid crashing against the wall. This has helped me in several situations, although at first I had a bit of trouble coordinating my fingers lol.
Try different characters all the time, so that you get to know which to use in a particular event. I use sonic for speed events, tails for events with lots of turns, amigo for traffic attacks and danica as a well balanced chraracter.
Theres an S rank difficulty?? Who was this game aimed at again?? Sumo musta been under some bizarre influence when making this...
Last kart game I played was MK Wii, I remember I got super angry at it (and even left the game) because when unlocking I had to complete sets of races for which the outcome relied very heavily on luck. It is a long and hard process, but at least unlocking in this game in general is much more about skill than luck.