1999
2000

Compact robot (height 50cm) capable of bipedal motion. Incorporated a total of 24 joints within its body, enabling it to carry out not only basic movements but to also balance on one foot and even kick a ball. Attracted attention as the para para dancing robot.

Second-generation AIBO, its additional sensors and LEDs enabled it to express an increased range of emotions, such as joy. New speech-recognition and image-capturing functions were also added.
2001

This model provided a new look for AIBO with its charming design. When programmed with its dedicated software, the ivory-colored LATTE. would take on an obedient and gentle personality, while the gray-colored MACRARON model would behave in a playful and mischievous manner. These characteristics would evolve according to the AIBOs interactions and environment.

This model featured a striking new futuristic design. Software could be added to provide an enhanced interactive experience, while images and sound captured via its integrated camera and microphone could be transferred and enjoyed on PCs.
2002

Incorporating Real-time Integrated Adaptive Motion Control activating a total of 38 joints around the robot's body, as well as advanced figuration and sound recognition functions, this model delivered enhanced movement and richer communication. At 58 cm, it was 8 cm taller than the SDR-3X.

A caramel brown AIBO uniquely designed to resemble a pug dog, it delivered the same core functions as the ERS-311/312.
2003

Designed for use within the home, this compact bipedal robot featured enhanced safety and durability, and increased capacity for communication. It sang original songs written by Ryuichi Sakamoto, and could perform dance demonstrations.
| *QRIO was a prototype, and was not launched commercially. |

Heralded a new stage in the evolution of robot entertainment, with its wide variety of sensors and LEDs realizing advanced image recognition and a range of versatile expressions.

The successful development of integrated walking, jumping, and running movement control technology resulted in the world's first running humanoid robot.