Yep. Hybrid cars are god in Kart race. Period. Anyway, Crazy Gadget is fairly easy if you have mastered the fundamentals, like homing attacking, Spindash jump, etc. The first time you play it, it is expected to get a D,C, or (if you're lucky, like I was) a B. Later on, though, it becomes a cinch as you learn the gravity switches, and how you can skip going sideways in a certain room. Hard mode, just play through without dieing, 100 rings should be no problem, mission 3, the chao is in the gravity room near the missile activation switch (I think, I haven't played it for about a year), and the time limit is a joke. And btw, all A ranks is incredibly easy after a little practice. If you were like me, you just wanted to complete the missions, regardless of whether you got an A rank or not, and it became easy on the second time through. Now I'm going to finish up all A ranks on Sonic Heroes....I'm only 8 away now :D