Tripping is gone in Smash Bros. Wii U/3DS

Masahiro Sakurai has confirmed that Super Smash Bros. Brawl’s tripping mechanic will not be back for the new Smash Bros. on Wii U and 3DS. He told Kotaku: “To answer quite frankly, it will not return,” he said through a translator. Tripping is something that dedicated Smash players weren’t a fan of, so most will probably be happy to hear about its removal.

Source