A second generation of virtual pets was marketed six months after the launch of the first, followed by a third in 1998. Each player starts with a baby-level digital creature that has a limited number of attacks and transformations and to make the creature stronger by training and nourishing the creature; when the player is successful in a workout, the Digimon becomes strong, when the player fails, the Digimon becomes weak. Two devices can be connected, allowing two players to battle with their respective creatures, an innovation at the time, however, the battle is only possible from the moment the creature is in the child level or bigger. Playgrounds and subways were where the majority of users of the apparatus were concentrated; The virtual pet was banned in some Asian schools by being considered by parents and teachers as very noisy and violent. The first Digimon were created by Japanese designer Kenji Watanabe, influenced by American comics, which were beginning to gain popularity in Japan, and as such began to make his characters look stronger and "cool. " Other types of Digimon, which until the year 2000 totaled 279, came from extensive discussions and collaborations between the Bandai company members.