RoboRiders RoboRiders was a TECHNIC theme launched by LEGO in 1999 as a successor to the Slizers theme . It was short lived , and was discontinued in 2001 , when it was replaced by BIONICLE . A total of seven official and four promotional set s 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 . Background . Somewhere in cyberspace , there lived an un - named , advanced species , on a world divided into six regions : Dust , Ice , Lava , Stone , Power , and Swamp . A mysterious enemy arrived on their world and unleashed a virus , which spread across their world . To counter the virus , the species created wheel - shaped armour for themselves , and six motorcycle - like machines , called RoboRiders , to travel in . The RoboRiders could fire elemental blasts by launching their rider . Eventually , the RoboRiders vanquished the virus and saved their world . It was never revealed who the Boss RoboRider was . It has been speculated that he was either the one who unleashed the virus , or that he was the leader of the RoboRiders . The promotional sets never appeared in the storyline but it has been speculated they were created to help the Roboriders . Types . Power RoboRider . Power ' s City - Realm is not a safe place to be . This world is a huge city with acid rain , toxic fumes , and several highways with broken paths that are hard to cross . Power has giant cranes for his enemies . Power is armed with two plasma cannons and a wheel launcher . He has the element of metal - poison . His colour is yellow . Frost RoboRider . Frost ' s Ice - Realm is known for temperatures far below frost temperatures ; almost reaching - 50 degrees Celsius ( - 58oF ) . It also has dangerous wind - icestorms and is filled with frozen obstacles . Ice caves , thorns , and monsters are everywhere , but there are also ice monsters . The colour of Frost RoboRider is white . He can can shoot ice - spears and also has a wheel launcher . His element is ice , and he is also coloured gray and Transparent Blue . Lava RoboRider . Lava ' s Magma - Realm is filled with extreme heat , molten lava spewing out of volcanoes as well as constant rains of fire . Lava monsters are his main enemy . He is capable of swinging his flameaxes , and is armed with a wheel launcher as well . He has the element of fire / lava . He is red and orange . Swamp RoboRider . Swamp searches for the virus in the murky Swamp - Realm that is filled with deep holes , slippery pathways , and a jungle full of entangled vines . Swamp ' s enemies are large blue blobs that emerge out of the water . He is armed with twin Katanas to cut through thick vegetation , and is additionally armed with a wheel launcher . He has the element of flora / water , his colour is lime green . Onyx RoboRider . Onyx stays firmly in his Rock - Realm where he searches in the large mountain caverns and caves , but this is not truly a safe place since there is almost total darkness and Onyx is the only one known to be able to see perfectly well in this realm . His adversaries are giant rock monsters . His weapons are twin laserbeams , and he is armed with a wheel launcher as well . He has the element of earth . Onyx is coloured black . Dust RoboRider . Dust searches for the enemies in the much - dreaded Desert - Realm . There are howling sandstorms that are very difficult to navigate through , the terrain is very tough to drive in , and there is always a danger of drowning in quicksand or monster sandstorms . Dust ' s main enemies are the sand pits . Dust is armed with two spears , and is also armed with a wheel launcher . He has the element of sand / wind . Dust is tan - coloured . he also fights large hands that have glowing palms and large worms that live in the sand pits . Boss RoboRider . The Boss was the last set ever released in the theme . No official description has been given so it will remain unknown if he is the evil RoboRider that launched the virus or if he is the commander of the other RoboRiders ; however , an issue of the LEGO Shop At Home catalog refers to The Boss as " The new generation of RoboRiders " . He apparently likes to lurk in the Desert - Realm and the Ice - Realm ( as seen on box ) . His elements are unknown , his colour is orange . Wheels . The wheels were included with the RoboRider sets . There were sixteen different types of Wheels who were characters before they changed into the Wheels . They were available in every RoboRiders set in different colours . Special golden wheels were released in combo packs . Each RoboRider had instructions for a combination model in the back of the instruction manual . The pairs were as follows : Additionally , instructions for the following combinations were available on the RoboRiders website :