Core Deck Case

"Core Deck Cases" are special deck cases used in the Future Card Buddyfight anime, they are built using Photon Metal.

When a person finds and becomes Buddies with a monster (normally by finding a Buddy Rare card), they are given a Core Deck Case by a Buddy Police officer. Core Deck Cases allow the user to "Luminize" their decks, allowing them to have a Buddyfight at any time together with their monsters, as well as using their Buddy Monster's abilities (such as flying).

When activated, Core Deck Cases transform into "Core Gadgets" with different forms.

As explained by El Quixote, the Core Gadget takes the shape of an object that reflects a fighter's inner hopes and dreams, either taking the shape of a personal symbol of strength for that fighter, like the Sun Belt for Gao, reflecting his dreams and ambition of becoming the Sun Fighter, or the Dragon designed Lance for Noboru, reflecting his straightforward personality and ambitions to become a Dragon Knight, or they take the shape of an object reflecting a person's inner wants and needs such as Tasuku's Armor while as the Purgatory Knight to hide his true identity from others.

Core Deck Cases seem to know who their legitimate owners are, and if used by someone else they will keep the shape that represents their real owners. If a fighter has more than one Core Deck Case, they will all take the same form, even if they are Dark Cores.

Core Gadgets automatically draw cards for players when their crystal is touched, shuffle their hands, and summon the monsters in battle while an automatic voice guides the player during their respective turns. Most, if not all, Core Gadgets have the ability to levitate as well. Without any noticeable input, these Core Gadgets can remain at the fighter's side within hands' reach and can automatically track their movement to adjust accordingly, such as when flying in the air due to a Buddy Skill. These Core Gadgets can also levitate back towards a player's side such as when they're deliberately thrown away by them.

Players who do not possess their own Core Deck Case can use an all-purpose Core Gadget to luminize their decks when fighting against someone who does own a Core Deck Case.

When a Core Gadget uses Future Force, the crystal becomes red.

Dark Core Deck Case
A "Dark Core Deck Case" gives its owner the ability to use Disaster Force. The user can become more malevolent and power-hungry if they can't control the Dark Core's powers. Anyone who comes into contact with a Dark Core becomes negative, sinister and darker under its influence. They can also be used to possess others, as seen with Doai. It has also been shown to occasionally surprise the user and activate Disaster Force without their permission.

All known Dark Cores so far are black colored when inactive and have an eye-like figure over the crystal. Like the Core Deck Cases, it allows the user to "Dark Luminize".

According to Kyoya, they are developed by his financial group after Disaster Force was "accidentally discovered". An additional side effect of using Disaster Force is that it fuels a portal to Darkness Dragon World, allowing monsters from it to invade Earth.

A deck case themed after the Dark Core was released.

Neo Deck Case
Nothing much is known about them other than the fact that it is quite new and so far only Buddy Police Officers have them.

One characteristic that differentiates them from standard Deck Core Cases is that the crystal is colored red, similar in appearance to when the standard Cases utilises the Future Force.

According to Jack and Tasuku, this model of the Deck Core is implied to be able to withstand Yamigedo's power and not malfunction or be destroyed.

Omni Lord Emblems
Other than having the same uses as other Core Gadgets, these Emblems (in the shape of an orb) are another way to recognise a being as one of the 8 current Omni Lords (Other than the amount of "horns" they may have).

When a current Omni Lord has reached the end of their life or seeks to retire, they may pass it down to another monster, an example being a disciple of theirs, allowing the new wielder to become the Omni Lord related to that Emblem.

It would seem that these orbs have a unique method of activation as despite being granted Tenbu's Emblem, Drum was unable to utilise it at first.

In H Episode 32, Count Dawn noted that the Emblems cannot be wielded by monsters of other worlds besides the world the Emblem's Omni Lord belongs to. This was the reason Mukuro Shigamine can never become its master even if he took possession of one from an Omni Lord.