Heartbinder

Heartbinders (絆のお守り) are special items that appear in Kingdom Hearts III. They allow Sora to Link Summon certain allies to help him during his journey. They are obtained after significant story events or found in chests.

The Dream Heartbinder summons Meow Wow and the other Dream Eaters Sora befriended in the Sleeping Worlds; Pixel Heartbinder for Wreck-It Ralph; the Pride Heartbinder for Simba, the Ohana Heartbinder for Stitch; and lastly, the Ocean Heartbinder for Ariel.

Kingdom Hearts III
At the Mysterious Tower, Yen Sid gives Sora the Dream Heartbinder. Yen Sid explains that the Heartbinder enhances Sora's natural gift for connecting with others.

At the Caribbean, Sora and company run into a chest containing the Ocean Heartbinder, protected by the Lightning Angler. Following the Lightning Angler's defeat, Sora obtains the Ocean Heartbinder.

Locations

 * Dream Heartbinder: Given to by Yen Sid after returning to Mysterious Tower.
 * Pixel Heartbinder: Reward from clearing Verum Rex: Beat of Lead for the first time.
 * Pride Heartbinder: Received for putting out the fires at the Tank Yard.
 * Ocean Heartbinder: Found in a chest at the Undersea Cavern.
 * Ohana Heartbinder: Reward for completing Course A of Flash Tracer for the first time.