Rocko's Drilbur was first seen popping out of the ground in front of
Ash Ketchum and his friends who were on their way to Higaki City where the Isshu League was to be held. Together with its trainer
Rocko, the earth warrior Mogurew controls everything on land. During tag battles,
Rocko's Drilbur pairs up with
Soren's Braviary and they use a combination of moves for their attacks and name them appropriate to what the combination produces.
Rocko's Drilbur had a tag battle against
Cilan's Pansage and
Ash's Unfezant. The move combinations proved to be effective in the tag battle against
Ash Ketchum and
Cilan until they also decided to use their own combination of moves which ended up overpowering
Soren's Braviary and
Rocko's Drilbur and they lost the tag battle.