Answer: I think they do, but he reverses them so quickly you just can't notice. You know the flaps on a plane that control decent or assent? Well, he probably has something similar he can do so he won't crash into the ground.
Answer: A robot's circuitry is much like that of a humans-its just metal. For instance, wires carry energy, right? Arteries carry blood in an animal, which is in essence the same thing. So when Bunnie underwent her robotization, then anything flesh and blood was turned to metal and energy. So, the way her brain sees it, nothing really happened. (Otherwise it may have had her body reject the new parts.) And the robotic nerves could still carry signals, so it was like nothing happened-so to speak.
Answer: You got me there! I guess he's just too good to do something that uncool!
Answer: This has been under heated debat for a long time. Personally, I think that Mega Man's hand goes into his forearm, undergoes some sort of energy reaction that changes it into a cannon, and comes back out. If you look and compare the size, you know there is now way both a hand and a cannon would both fit in there. So I came to the conclusion that it relates to an energy transformation.
Several times Mega Man has had cannon restraints put on his wrists, which prevented him from forming an arm cannon. It never said how. So, if an energy reaction took place where the hand was, then the 'cuffs' would do no good. Therefore, I believe the hand enters the forearm, and does the energy change as stated above.
But, this is just an opinion...
Answer: These weapons are obtained from fighting Robot Masters. Before I explain this, however, I must explain energy.
Energy is nothing like what we know to power a robot-I am sure you are all thinking of electricity. These are two very different things. Electricity would electrify anything it touches, whereas energy can't(But, it may be very hot.) Metal conducts electrity, but energy won't. Otherwise, a robot powered with electricity would be like a walking battery with no seal, zapping anything it touched. So, robots are powered with energy, which is better suited to power robots. When a robot runs out of energy, it is destroyed. I think this is from a violent reaction from the energy dispersement, which is why they blow up.
Then we come to another topic: Normal energy and weapon energy.
The two are basically alike, but weapon energy cannot power a robot. It is used to create weapons, form a jet, or give something a new form, provided it has the weapon chip. A weapon chip tells weapon energy what to do. This weapon energy can do anything from create a laser, to a burst of fire, or create a solid blade of energy.
Normal energy is capable of attack methods like this too, but it is very inefficient and the robot would easily run out of power.(Mega Man had this situation to deal with once.) It instead powers robots. And it can create plasma, Mega Man's principle method of attack. If he holds energy in his cannon, the plasma will accumulate and create a blast, varying in color. Pink and blue are very hot, while white and orange are standard.
Anyway, weapon chips tell weapon energy what to do, how much weapon energy to use, and the effects to give. So in short, Mega Man uses weapon chips.
Note: Most of this information was obtained from Mandi Paugh. She has a great big section of it on her site, which goes into other related topics.
Answer: OK, so nobody asks this. But in case you were wondering, the answer is quite simple: They have NOTHING to do with Sonic or Mega Man!