No, it is the processing unit. The input would be its controller, output could be the video and audio as well as its rumble (if you have a controller with rumble).
It makes the N64 controller rumble when the player takes damage on a game.
If you crash in a game
When something happens in-game that is suppose to make your controller vibrate, or "rumble", the code in the game sends a message to your controller to tell it to send a current of electricity through the "rumble-pak" - making it feel like it vibrates. It wasnt until early 2000 that the first standard controller came with a build-in Rumble Pak. Before that not every game controller could rumble, some controllers that allowed for an add-on devices to be connected to the controller, such as the Dreamcast and Nintendo 64, had small things that was called "Rumble Paks" that you stuck in to a slot on the controller to make it vibrate when the games told it to. Not every game supported a Rumble Pak though so it was often described as a feature on the box saying that a rumble pak could be used with the game.
no
The controller you need while gaming will usually not be a factor in most gaming unless it is a driving game. Then you may need a wheel to play better. If you are using a gaming system such as the WII you will have a lot of different types of controllers.
The PS3 Dualshock is the exact same as the other, but includes the vibration or rumble feature, which basically shakes the controller during gameplay. So it is an improved version of the six-axis controller.
nope
A Bluetooth gaming controller made by nyko
One is able to get several different types of gaming systems with a wireless controller such as the following systems: On Live, XBOX 360, and the Nintendo Wireless.
A rumble pack or a memory card.
Logitech rumble pad is a great choice for a game controller.