Pietra

Pietra (Japanese: エリコ Eriko) is the character of the day in Right on, Rhydon!.

Pietra's grandmother sprained her ankle and Pietra wanted to make it easier for her to travel through the mountain by digging a hole in it. She was using Ground-type Pokémon to try to achieve this. They nearly got through but when they started to dig deeper, water began to drip on them and they got scared and ran away. Hence she resolved to capture a certain Rhydon which was able to use Surf and as such, wasn't afraid of water.

Pietra met Ash and his friends and together they came across Rhydon. It escaped into the lake, however. Ash and Misty used their Water Pokémon to help search for it. Pietra used her boat to go out on the lake. Soon, Totodile discovered Rhydon by accident and bit on its horn, angering it. Pietra tried to battle it but was unsuccessful after it used Horn Drill in the water and caused a whirlpool.

They then traveled over to a small island where they saw Rhydon coming to shore. Pietra encountered it again, but Team Rocket interfered and tried to take it for themselves. Ash assisted in stopping them and the Rhydon jumped back into the lake. Pietra jumped into the lake after it and grabbed it. Rhydon carried her under water but she refused to let go until it battled her, and eventually the Rhydon finally gave in and agreed.

She used her Marill to battle and defeat Rhydon and then captured it. She then used her newly captured Rhydon to complete the tunnel.