Xerneas

While Xerneas is on the stage, everyone's launch power will increase. This will make opponents with even a small amount of damage easier to launch. The player who summoned Xerneas will get the biggest power boost. Xerneas (, Xerneas) is a creature from the series.

Origin
is a Fairy-type that serves as the  of , and is categorized within the Pokédex at #716 as the "Life Pokémon". It is a member of the of  along with  and. Legend says that it possesses the power to bestow eternal life.

is Xerneas', which is a Fairy-type move that only Xerneas can learn naturally: after one turn spent charging, it raises the user's Special Attack, Special Defense and Speed by two levels each.

As a Poké Ball Pokémon
Xerneas appears as a Poké Ball Pokémon in Super Smash Bros. 4. Because it is a legendary Pokémon, it can also be summoned by a Master Ball. When summoned, it uses its signature move, Geomancy; this causes all players' attacks to have increased knockback, though the summoner is affected by this boost more than the other players.

In both versions it must be unlocked by completing a specific challenge before being able to appear:
 * In : play Target Blast at least once.
 * In : break 200 blocks in a single solo game of Trophy Rush as.

As a Poké Ball Pokémon
Xerneas returns as a Poké Ball summon, but with changed attributes. Geomancy now only affects the fighter who summoned it, and the summoner now turns golden for the duration of the power boost. A resulting, and 1.5× knockback multiplier are applied. Oddly, throws are not affected by the damage multiplier, and projectiles are not affected by the knockback multiplier.

Xerneas cannot be summoned on Arena Ferox, Balloon Fight, Brinstar, Corneria, Dream Land GB, Find Mii, Golden Plains, Jungle Japes, Living Room, Magicant, Onett, Pac-Land, Peach's Castle, PictoChat 2, Reset Bomb Forest, Spirit Train, Super Mario Maker, Suzaku Castle, Tomodachi Life, Tortimer Island, WarioWare, Inc., Wrecking Crew, nor Yoshi's Island.

Trivia

 * The pose used in Xerneas's trophy is nearly identical to its official artwork for Pokémon X & Y, albeit flipped horizontally.