Similar to the theme in The Nightmare Before Christmas, Decisive Pumpkin sports a Christmas motif with a tint of Halloween. The main hand guard is designed with Dr. Finklestein's skeleton reindeer, with the emblem of Jack wearing a Christmas Hat at the central part. The blade's body is Halloween Town's Guillotine snake-like statue, but longer and with a candy cane pattern. The blade also resembles the long snake seen in the film The Nightmare Before Christmas.
The Keychain sport a jack o' lantern motif, symbolizing Jack's image as the Pumpkin King, and the token is Zero. The symbols that appear when the Decisive Pumpkin makes contact with an enemy are jack o' lanterns, furthering the Halloween motif. It makes jingling sounds when it hits an enemy, completing the Christmas theme.
While in Space Paranoids, the Keyblade receives a blue and gray color scheme.
The latter part of this Keyblade's name probably refers to Jack Skellington's role as the Pumpkin King of Halloween Town. The former part probably refers to Jack's decision on doing either Halloween or Christmas during the events of Kingdom Hearts II.
The Decisive Pumpkin is one of the strongest Keyblades in the game, boasting a strength stat of +6, which is the same as Keyblades like the Ultima Weapon and Oblivion, and only bested by Fenrir. Its innate ability is Combo Boost, which increases the amount of damage done as more ground combos are completed, making it a devastating Keyblade.