Classic Kingdom

Classic Kingdom (クラシックキングダム) is a series of minigames in Kingdom Hearts Union χ and Kingdom Hearts III. They are simple, two-dimensional video games based on the handheld LCD games popular in the 1980's (the  games Mickey Mouse and Mickey & Donald in particular). The games feature Sora and Mickey as main characters, and feature various characters from classic Disney cartoons. There are 6 in Kingdom Hearts Union χ and 23 in Kingdom Hearts III.

Development
Classic Kingdom was first announced in the Classic Kingdom Trailer, shown as part of the Kingdom Hearts Union χ Dandelion Meeting at Anaheim, California in April, 2018. The trailer shows Sora receiving a device from Pence in Twilight Town, followed by a montage of gameplay from the games.

In Version 3.0.0 of Kingdom Hearts Union χ, a selection of five Classic Kingdom games were released as part of χ3. A limited-time challenge was held that rewarded players with a code to get the Starlight Keyblade earlier in Kingdom Hearts III by reaching a set total score for each game. In January 2019, the score requirements were cut by half, so that players have a better chance to get the Starlight Keyblade. The promotion was set to run until April 2019.

Completing all the Classic Kingdom games in Kingdom Hearts III earns the player the Classic Tone Keyblade.

Kingdom Hearts Union χ

 * Fishin' Frenzy
 * Giantland
 * The Musical Farmer
 * The Karnival Kid
 * The Barnyard Battle

Kingdom Hearts III

 * Giantland
 * Mickey, the Mail Pilot
 * The Musical Farmer
 * Building a Building
 * The Mad Doctor
 * Mickey Cuts Up
 * Taxi Troubles
 * The Barnyard Battle
 * The Wayward Canary
 * Camping Out
 * The Karnival Kid
 * How to Play Golf
 * Mickey's Circus
 * Barnyard Sports
 * The Klondike Kid
 * Mickey's Kitten Catch
 * Fishin' Frenzy
 * Beach Party
 * Mickey's Prison Escape
 * Cast Out to Sea
 * How to Play Baseball
 * Mickey's Mechanical Man
 * Mickey Steps Out

χ3 Score Targets

 * Fishin' Frenzy - 7500 points (later reduced to 3750)
 * Giantland - 50 levels cleared (later reduced to 25)
 * The Musical Farmer - 5000 points (later reduced to 2500)
 * The Karnival Kid - 30000 points (later reduced to 15000)
 * The Barnyard Battle - 25000 points (later reduced to 12500)