unlocking cars

I got the two best cars (it's lucifer not auxifer btw) by doing the usual 101 laps on any course. Idk why after a while of doing this it stopped giving me cars...?

So my trick was to unlocking the last 2 best cars was that first

- play on arcade mode and continue to the car selection

- choose the Rex car the original one not the racing one

- beat the whole 6 tracks using that vehicle (losing don't effect anything)

- once you obtain the R rex use that vehicle and replay all 6 tracks on arcade mode

- when you finish the last track there's a chance that it will say new vehicle unlocked

- if there's a cut scene at the end, watch the whole thing and again there will be a chance the last two vehicles will be there

Just to let you know if you want to unlock vehicles for 2 player mode, then race the four vehicles and when you get the R Janes vehicle choose that vehicle and again beat all 6 tracks and sometimes when the girl shows it will say "Congratulations you have earned a new car".