Tierra is a character appearing in Pokémon: Johto League Champions.
Pokémon the Series: Gold and Silver
Tierra is an archaeologist, who went to explore ruins belonging to a Pokémon Queen. However, her gear was smashed. When the heroes came, Brock managed to make a new device based on frequency. Tierra guided them through the ruins and saw Team Rocket took the Queen's staff and mask. Team Rocket went away, so the heroes followed them. Jessie tried to use the power of the mask and staff to make influence outside the ruins, but Tierra told her the artifacts work inside the ruins. Brock sent Golbat, who evolved into Crobat, to get the artifacts back. Tierra was disappointed that the ruins were destroyed, but was happy that the staff and mask were retrieved.