Mario:Mario + Rabbids Kingdom Battle level editor

The Mario + Rabbids Kingdom Battle level editor is DLC released on 31. It comes with the season pass and is also available to people with Mario + Rabbids: Sparks of Hope save data. It allows players to make their own stages for the game and share them with others using an interface similar to Super Mario Maker, although optimized for non-touchscreen use.

Basic editing
When making a level, the gameplay style must be chosen before beginning and cannot be changed. Afterwards, the 3-6 starting hero positions are put onto a 10x10 (expandable up to 99x99 by dragging the corners) grid along with solid ground under them. A cursor identical to the one used for tacticam appears, which can be used to move elements.
 * Singleplayer: 3 heroes. Skill tree/weapons can be modified.
 * Co-op: 4 heroes, separated into P1 and P2. Skill tree/weapons can be modified.
 * Versus: 6 heroes, separated into P1 and P2. Skill tree/weapons can only be chosen from presets.
 * DK: 3 heroes, those being DK, Rabbid Cranky, and Rabbid Peach. Skill tree/weapons can be modified.

Controls

 * Control Stick: Move cursor
 * Right Stick: Rotate camera
 * Uses a camera control similar to the in-battle one by default. Pressing the right stick changes it to a more gradual one similar to the overworld camera.
 * A: Place element from menu
 * B: Delete element
 * X
 * Hold: Pick up/put down single element
 * Press: Rotate element
 * Y: Select multiple cells to move the contents of (pressing once begins selection, pressing a second time picks up selection, pressing a third time sets down selection)
 * ZL: Undo
 * ZR: Redo
 * L: Zoom out
 * R: Zoom in
 * D-pad: Navigate element menu

Level editor
The left end of the element menu has a menu icon that allows for editing level parameters, saving levels, loading levels, playing levels, sharing levels, and accessing online. The right end has a menu that drops down a list of all available elements. The most recently used elements are in between for easier access.

List of level parameters

 * Turn limit: The maximum number of turns a level can take
 * Win condition: The requirements for winning
 * Defeat all: Defeat all enemies
 * Defeat Midboss(es): Defeat all midbosses
 * Reach area(s): Reach specified points
 * Escort to area: Have Toad/Toadette/Spawny reach an area
 * Retrieve Washing Machine parts: Get washing machine parts (can only be selected if there is at least one Collector on the field. Collectors do not drop parts unless this is set to win condition)
 * Stop Smugglers: Prevent Smugglers from reaching area (can only be selected if there is at least one Smuggler on the field. Smugglers use normal Smasher AI if this is not selected as the win condition)
 * Enemy super effect: If enemies have a 100% chance to get super effects when they hit the heroes

List of styles

 * Non-DK
 * Megabug (blue featureless grid used for tutorial co-op challenges and Ultimate Challenges)
 * Garden
 * Desert
 * Sherbet
 * Trails
 * Courtyard (Spooky trails areas with stone paving)
 * Lava
 * Mushroom (Lava Pit glowy mushroom areas)
 * DK
 * Beach
 * Jungle
 * Dungeon

Testing levels
Levels can be tested at any time by pressing the minus button. For singleplayer and DK levels, this operates identically to initiating a Challenge with the three starting party members selected. For co-op levels, this opens up the standard singleplayer before-battle overlay with the Tacticam and Battle HQ options (with the first four party members selected), although going to team selection in the battle HQ pulls up the cop-op character select. Both sides are controlled by one controller if tested directly from the editor. For testing VS, it is completely identical to starting a normal VS match, except both sides are controlled by one controller if tested directly from the editor.

For all modes' testing, the only three pause menu options are Resume battle, Restart battle, and Back to editing.

Sharing levels
Sharing levels can be done either online or locally. Local sharing allows for other nearby consoles to download a level being shared, and shared Co-op/VS levels can be played with two separate consoles. Sharing a level online allows anyone to play it, and levels can be searched by name, level ID, or uploading user and filtered by level type and win condition. Co-op/VS levels can also be done with friends online, supporting voice chat with the Nintendo Switch Online app.