Fine. The answer is 11922911. Or perhaps you know it as "Double-one, and nine too. Tonight makes eleven.
I will now explain. The first riddle mainly deals with how hard this is to guess. No matter your battle skill, you'll lose the RIDDLE. The "hint" part refers to the hint line.
Protecting the masses refers to those on the cruise- the code stops unwanted strangers, however, Nebula and Toma/Napalm get in easily, leaving you stumped.
The second riddle is a bit more specific. Waiting for the time refers to the crew opening the door. If you open the door, you get to the engines, and can endanger the whole ship. If you don't guess the answer, you'll never pass; Haunt forever.
The third riddle refers to the answer itself. In fact, it even gives part of the answer...
SB20, your move.
Topic: Mega Man Riddles