Phantom hits now inflict damage equal to half the damage an attack would have done, and while they don't produce any knockback and require a smaller part of the hitbox to connect, they cause the opponent (and not the attacker) to enter hitlag, can be SDI'd, and the real hit can still connect afterwards.
Training mode now appears as the default Solo mode, and after entering it, the same characters that participated will appear chosen automatically for Group battles.
Home-Run Contest stadium no longer has a protective window, acting like its Melee -counterpart. Its online competitive mode has also been added as a co-op mode offline, with records being saved.
Due to issues with slow motion, Timers are removed and replaced with ordinary stickers, even for Training mode. Poke Ball Pokemon are also changed slightly: Latios & Latias deal half their usual damage, and Weavile no longer stuns opponents, instead sending them on a weak upwards trajectory. Other items remain unchanged, though, aside from a few Final Smashes.