From Bulbapedia, the community-driven Pokémon encyclopedia.
Tierra (Japanese: ナツキ Natsuki) is the character of the day in the anime who appeared in the episode Control Freak!.
She is an archaeologist who was trying to find out a secret chamber in which a magical mask having the power to control the minds of Pokémon was placed.
Ash, Misty and Brock first met her when Brock's Golbat flew away while they were having a meal. Brock followed Golbat and he came across Tierra lying unconscious. Brock, as always, immediately fell for her and helped her regain her senses.
Later, the four managed to find out the magical mask they were seeking, only to have Jessie steal it and use the power of the mask to control Brock's Geodude and Onix, Ash's Pikachu, and Misty's Togepi. Brock's Golbat managed to break through the power of the mask, but was attacked by Geodude and Onix and was buried under rubble. Brock risked his life to dig out Golbat and then afterward, it evolved into Crobat and blasted Team Rocket away. After that, Tierra kept the mask for further study and the group waved good-bye to her as they continued their journey to Olivine City.
- Tierra's name may come from the word tiara, a symbol of power, similar to the mask in the episode she appeared in. It may also come from the latin word terra, meaning "earth". This may come from the fact that, being an archeologist, she works with earth.
- However, in the European Spanish dub she was named Marina, which means "from the sea", possibly because Tierra is not a given name in Spain, but a common noun ("earth").