If you haven't managed to get a hold of it by other means, Nintendo Australia has informed us that the Super Smash Bros. demo is now available on the 3DS. No trickery involved, it's actually on the Australian eSHOP now!
Certain Club Nintendo members might have had access to the demo already, but it's now in the wild for the rest of us.
The demo features five playable character — Mario, Villager, Link, Pikachu and Mega Man — and they can duke it out on the Battlefield. The demo, from what I can tell, can only be played 30 times, but it is possible to set up local multiplayer with others who have downloaded the demo.
The game itself is set for release on October 4 in Australia.