Summon

Summon is an option within the tab of the  single-player mode that allows players to summon certain spirits with cores obtained by sending spirits home in the Dismiss menu. Some spirits are only obtainable through this method, meaning the only way to collect the total number of spirits is to summon some of them. Previously summoned spirits may later appear on the Spirit Board, and others can be encountered in World of Light without needing to summon them first. There are 133 summonable spirits, 91 of them are summon-exclusive, and of which, 15 of them can appear on the Spirit Board after the first summon.

How to Use
Each spirit has a certain amount of cores and SP required in order to summon it. Often, the type of cores needs to be specifically from a certain spirit. For example, summoning a Paper Mario spirit consumes a Cut Man spirit and Cardboard Box spirit, along with any Neutral type spirit.

The player may also directly use spirits in summoning, rather than dismissing them first and then summoning. The game will automatically dismiss the chosen spirits (gaining SP for the dismissal) and use those cores for summoning.

List of spirits that can be summoned
Below is a list of spirits that can be summoned within this menu, listed by spirit number, along with the cost of SP and cores for each summon, and if they're summon-exclusive or not.

Trivia

 * The Absolutely Safe Capsule is the only summonable spirit that requires a summonable spirit (Mr. Saturn) to summon it.
 * In addition, it has the most summonable cores that are required to summon, with a total of six.
 * Ribbon Girl and Ninjara are the first summon-exclusive spirits to gain spirit battles in an update, with Poppi α being third.
 * These spirit battles are only accessible in their respective DLC Spirit Boards.
 * Poppi α is the only summonable spirit that can be purchased.