All robos are designed to fold neatly into Robo Cubes. This obviously makes storing one's robo simple and greatly facilitates launching it into battles. A folded robo cube is normally unfolded at the start of a battle--when the Commander makes strong mental contact with it. Depending on the size of the robo's body, the size of the robocube will also vary accordingly. There are 4 unofficial cube sizes: small, medium, large, and extra large.
In Custom Robo (Nintendo 64), Custom Robo V2, and Custom Robo Arena, each side of the robo cube is color-coded and specifically-marked to indicate each robo part. Per the CRA's regulation, this scheme is standard for all cubes:
It is optimal for a robo cube to land such that the Head is on top and the Legs are on the ground. Here is a list of what happens to the robo depending on how the cube landed:
|Head on Bottom, Legs on Top||Head stuck in ground. Significant delay in starting.|
|Chest on Bottom, Pod on Top||Robo gets up from ground from face down position. Minor delay in starting.|
|Pod on Bottom, Chest on Top||Robo gets up from ground from face up position. Minor delay in starting.|
|Gun on Bottom, Bomb on Top||Right arm stuck in ground. Moderate delay in starting.|
|Bomb on Bottom, Gun on Top||Left arm stuck in ground. Moderate delay in starting.|
|Legs on Bottom, Head on Top||Robo unfolds standing. Little to no delay.|
In Custom Robo GX and Custom Robo (GameCube), the robo cube has a completely different design. It is a clear cube that looks glass-like in design. In addition, these cubes count down instead of unfolding, starting with any number between 1 and 6. Once the count down is completed, the robo will burst out of the cube and will start the fight. Be careful as the countdown will roll over from 1 to 6 if it "reaches" 0 before landing firmly on the ground.
In all of its appearances, mashing buttons will help speed up the unfolding process/countdown timer.
- In all of the titles except for Battle Revolution, the Robo Cubes can bounce around a lot. This suggests that they don't have much weight to them and have little air friction.
- The Robo Cubes in Battle Revolution seem to have significant weight and/or more air friction to them due to how little they bounce when launched out of the Robo Cannon. They also have a more metallic noise to them when bouncing.
- The Robo Cube from Battle Revolution appears in Super Smash Bros. Brawl as a Sticker.