so I'm sure many of you recall reading that the 3ds had rumble built in, when info was first being leaked about what the 3ds had to offer before e3. Well that fact did not turn out to be true. And obviously, the 3ds does not have a gba slot, so a rumble expansion pack can't be used in that sense like for some choice ds games. What I'm wondering is, would there be a way for games to incorporate rumble if they wish? The example that immediately comes to mind is Pokemon pinball. Perhaps a ds cart thats a little oversized on the top to allow for the rumble pack. But i have to question if such a thing were to be created for a choice game, would it require its own battery like pokemon pinball? Or could it run off the 3ds power like the ds rumble games. And if no battery is necessary, could a rumble pack be created so small that it would fit in a standard 3ds cartridge without overflowing out the top like pokemon pinball? What do you think? I think if a developer wanted to, they could create a game with rumble by creating a 3ds cart that overflows off the top, but doesn't need its own battery.