Apologies for the sudden disappearance of recent content; here for the second time is today's update on the official Smash Bros. Website, taking two traditional items, barrels and crates, a little bit further.
In Super Smash. Bros Brawl, crates and barrels take on different appearances to match the theme of certain levels. For example, up in space a futuristic shell replaces the traditional wooden approach, and in the vibrant colourful Yoshi's Story level turn into presents. Creates can also have wheels to get away from a much needed smash.
Be sure to stick around for updates...