Bubble RockyBubble Rocky was a recommended character that appeared in "Don't Pierce My Flesh". Despite having a different name, it appears to just be a clone of Rocky. (though it may have a slightly paler texture)
It was presumed dead when the volcano they were in erupted in the same episode. It was recommended by MVboys3.
Ender Rocky is a recommended character in "Return of the Hang Glider". It is a black version of Rocky with purple eyes. It resembles an Enderman from the Minecraft franchise, which is black and has purple eyes. It was recommended by jaggerbug.
Green RockyGreen Rocky appeared in "Lick Your Way to Freedom". They were recommended by edencudak. The recommender is also Cutiesunflower, a user on this wikia.
Robot Rocky is a recommended character that appeared in "Bowling, Now with Explosions!". It is a mechanical Rocky. It was recommended as part of a duo in Episode 16 with Robot Flower. It appears to be a simple block.
Rockette is a recommended character that appeared in "The Glistening" as one of the many RC's to vote for Ice Cube to be eliminated. It is a one-armed variation of Rocky with a rainbow bow on its head. It is most likely to be a female due to its name and bow.
White Rocky's appearance is similar to Rocky, only he has arms and is colored white.