The outline feature for the 3DS version was revealed to be an optional feature.
Quote:
Super Smash Bros. director Sakurai has once again taken to the Miiverse to show off the 3DS version of the game. In his newest post, he displays both visual filters -- without outlines (on the left), and with outlines (on the right). Sakurai also confirms 3D effects, which might be the first time they've even been confirmed or mentioned
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http://www.destructoid.com/sakurai-s...s-272466.phtml