Both Little Robot and her Sister are voiced by Janice Kawaye.
Just like Little Robot, this robot can transform into a large threatening killing machine.
She first appears in "Made in Japan II", when the toy factory in Osaka notice one of their robots are missing and they send the evil robot to "search and destroy" Little Robot.
The Evil Robot is mean and aggressive and attacks Squishington and Mr Bumpy. Little Robot starts to battle The Evil Robot, but doesn't have the heart to hurt her because they are sisters.
Squishington then plugs the Evil Robot into the computer and reprograms her, changing her to good and both sisters are happily reunited.