Sparks

 Sparks (voiced by Jan Rabson) is a toy blue, silver and red robot with flashing red eyes, red claws, and a blaster cavity in his chest that spits out real sparks when he’s rolling around on his wheels (but is completely safe for children). He can also elevate his body to make himself taller. He is seen in the film greeting Buzz upon Andy's toys' arrival, and later gambling in Lotso's gang's hideout. He is later seen helping lock up Andy's toys when they try to escape, and is seen for the remainder of the film patrolling Sunnyside. When Andy's toys are about to escape, Sparks and the other toys are convinced of their leader's treachery, and turn on him. He is seen living happily at Sunnyside after Lotso's defeat in the credits.

Toy Story 3
Sparks is a robot toy at Sunnyside Daycare. He has shown to be both blunt and sarcastic. Sparks' retro design has flashing red LED eyes and a blaster cavity in his chest that spits out real sparks when he’s rolling around on his wheels (but is completely safe for children). He sports telescoping arms with working pincers and he can also elevate his body to make himself taller. He starts out as one of Lotso's henchmen, but in the end is reformed when he (along with his cohorts) find out about Lotso's past and how he really is.

Trivia

 * Sparks appears to be based on the sparking-action Transformers toys from the 1980s. These toys were considered dangerous, and are no longer able to be produced. None of the current Sparks toys made include the sparking feature; the only Sparks toy currently manufactured (the Thinkway Toy version, seen in the picture above) has a light in its chest replicating the sparking feature.
 * Sparks is similar to Robot, particularly his robotic arms and treads.