Command Matrix

The Command Matrix (コマンドマトリックス) is the command system in Kingdom Hearts Re:coded. Before deck commands can be used in battle and in the field, they need to be installed in the Command Matrix.

The commands that can be installed are limited by the amount of Memory each command takes up and the number of available slot groups in the Command Deck. Three slot groups are available initially, with up to five additional slot groups that can be unlocked by hooking up chips to Command Expansions in the Stat Matrix.

Command Conversion
A slot group consists of two blue slots and one red slot. If commands are installed in the two blue slots, they will be "test-converted" into a new command, which appears in the red slot and the Command Deck. If the two blue slots are filled with compatible commands, indicated by a yellow highlight in the selection menu, the red slot will contain a wholly different command; otherwise the red slot will simply contain a stronger version of the command in the first blue slot.

Defeating enemies earns Command Points (CP) for all installed commands. When a command accumulates enough CP, it is marked with an exclamation point. When two marked commands are installed in adjacent blue slots, they can be permanently converted into the command that appears in the red slot. The converted command may receive an additional bonus, called an  Overspec, in which it may either gain extra levels, fill the Clock gauge more quickly, or have a faster reload time. In the latter two cases, the command will be marked with a   or   symbol, respectively, next to its name, and the symbols will be passed down to any other commands created through conversion. If a command has received both bonuses, it will be marked with a   symbol. In rare cases, a command may receive a   Overspec from a single conversion, even if it had neither of the two Overspecs prior to being converted.

Commands can be converted over and over, but no command can exceed a maximum level of 100. Level 100 commands cannot be permanently converted while in the first slot unless they are producing a new command. Some commands can only be obtained through Command Conversion. Item commands cannot be converted at all and will disable the second blue slot when equipped.

Memory usage when test-converting commands is based on the converted command's memory usage, not those of the commands installed. Thus, installing a command in the second slot that doesn't change the resulting command produces no change in memory usage. This can be used to gather CP for commands that are not in use without changing the equipped commands for battle, which has the added benefit of making the equipped commands slightly stronger. One can exceed 100% of memory usage when testing out conversions so long as they are within the limit when they exit the menu. For example, if one has achieved 100% memory usage with less than the maximum number of commands equipped (i.e. 7 commands with 8 slots available), they can use the open command slots for converting commands with max CP so long as they remove the new converted commands afterwards.

Compiled commands
During the Labyrinth of Olympus Coliseum, deck command mechanics are modified drastically, in order to suit the area's turn-based gameplay system. The new mechanics involve converting and combining deck commands to unleash new ones.

Donald and Goofy commands
During Hollow Bastion I, Data-Sora can not use any commands himself, aside from item commands, due to his lack of Keyblade. Instead, deck commands are substituted into commands that Data-Sora's party members execute. Hence, activating a command causes Data-Sora to call out to the appropriate party member, who responds and then performs an alternative command.

When Goofy is an active party member, Data-Sora's attack commands are each substituted into one of two Goofy commands. When Donald is an active party member, Data-Sora's magic commands are each substituted into one of two Donald commands.