
Certain Spirits offer abilities outside of battle. For example, a giant rock is blocking a path, but once the Bomberman Spirit is unlocked, he will destroy the rock. Going into a battle with a lower power level and winning will result in additional post-fight rewards. The idea is to equip your own team of Primary and Support Spirits to increase your power level to match the opponent's.

Neutral offers no advantages or disadvantages (fitting, right?) The spirits have a Rock-Paper-Scissors-Spock sort of relationship - Attack beats Grab, which beats Shield, which beats Attack. Spirits are broken up into four types: Attack (Red) Grab (Green), Shield (Blue), and Neutral (Yellow). The idea is that Spirits increase a fighter's stats, while also offering different buffs to take into battle. Debuting in Ultimate is a feature called Spirits, which function sort of like a combination of Stickers and Trophies from previous titles. Spirits are taken from every one of the fighters' respective game worlds, along with some Nintendo titles that don't have a representative in Smash Bros. Spirits are used primarily in the World of Light adventure mode. You thought the playable Super Smash Bros Ultimate roster was big? You haven't seen anything yet.
