. . . . . . . . "A total of seven official and four promotional sets were released while this series lasted. Special RoboRiders canisters, when exposed to cold temperatures, would reveal codes used to play an online game. Their canisters are similar to those of early BIONICLE sets."@en . . . . . . . . . . . . "2000"^^ . "A total of seven official and four promotional sets were released while this series lasted. Special RoboRiders canisters, when exposed to cold temperatures, would reveal codes used to play an online game. Their canisters are similar to those of early BIONICLE sets."@en . . . . . . "RoboRiders"@en . . . . . . . "RoboRiders"@en . . . .