IntelliHeath
As in "Heathcliff"
Newcomers
Villager
Mega Man
Wii Fit Trainer
Rosalina & Luma
Little Mac
Veterans
Mario
Luigi
Peach
Bowser
Link
Zelda
Toon Link
Donkey Kong
Diddy Kong
Kirby
King Dedede
Pikachu
Lucario
Fox
Pikmin & Olimar
Pit
Marth
Samus
Sonic
3DS Stages
Arena Ferox (Fire Emblem Awakening)
Battlefield
Boxing Arena (Punch-Out!!)
Gerudo Valley (Legend of Zelda: Ocarina of Time)
Living Room (Nintendog)
Lumiose City (Pokemon X/Y)
New Super Mario Bros
Rainbow Road (Mario Kart 7)
Reset Bomb (Kid Icarus: Uprising)
Spirit Train (Legend of Zelda: Spirit Tracks
StreetPass Quest (StreetPass Quest/Find Mii)
Tortimer Island (Animal Crossing)
Wii U Stages
Battlefield
Boxing Arena (Punch-Out!!) [1] [2]
Dr. Wily's Castle (Mega Man 2)
Garden of Hope (Pikmin 3)
Palutena's Temple (Kid Icarus)
Pyrosphere (Metroid: Other M)
Skyloft (Legend of Zelda: Skyward Sword)
Smashville II (Animal Crossing: City Folk) [2]
Super Mario Galaxy
Training Room (Wii Fit)
Windy Hill Zone (Sonic: Lost World)
Wuhu Island (Pilotwing Resort)
Items
Bumper
Capsule
Fire Flower
Green Shell
Home-Run Bat
Motion-Sensor Mine
Pokeball
Ray Gun
Smash Ball
Hook Beetle (Legend of Zelda)
Fairy in a Bottle
Hocotate Ship (Pikmin)
Torpedo Gun (Steel Diver)
X-Bomb (Kid Icarus: Uprising)
Assist Trophies
Nintendog
Stafy
Waluigi
Ashley (WarioWare)
Mother Brain
Skull Kid
Pokeball Pokemon
Dedenne
Palkia
Xerneas
Trailer
SSB Wii U and 3DS E3 Trailer
Newcomer Trailer - Mega Man
Second Trailer w/ WiiFit Trainer
Director Direct - Sakurai on SSB Wii U and 3DS
Sonic Trailer - HD
Rosalina and Luma Trailer - HD
Little Mac Trailer HD
List of Balance Changes