The key to fighting multiple opponents is not getting between them. It's harder to deal with two opponents at one time than it is to deal with one person at a time. Stay outside the group of attackers and try to force them to fight you one at a time.
A true ninja will wait and train to become even better. Making a fake enemy isn't a good option and would cause troubles. Patience is the ninja's virtue.
Not necessarily. Fighting well is more about technique than raw strength. For example, a small person can fairly easily knock a larger opponent down if they are able to throw...
I don't think it matters whether you fight Bowser before getting all the stars or not. As long as you have 120 stars when you defeat him, you'll get Luigi.
Of course. Always plead Not Guilty -- traffic tickets are largely a huge money conveyor belt for the states. Get a lawyer -- lawyers can get you out of most...