Turtwig
The Tiny Leaf Pokémon
Type: Grass
Official Registration #: 387
Entry: One of three pokémon traditionally offered to new trainers at the beginning of their journeys in Sinnoh. A small tortoise pokémon native to Sinnohan forests, turtwig is known for its soil-packed shell and its ability to photosynthesize, as well as the misconception that, as a small, shelled reptile, it is in any way related to squirtle or tirtouga. In actuality, turtwig occupy a completely different family from either of these pokémon. One can easily tell the difference by adaptations: whereas squirtle and tirtouga fare perfectly well in water, throwing a turtwig into the ocean produces far grimmer results.

Grotle
The Grove Pokémon
Type: Grass
Official Registration #: 388
Entry: The evolved form of turtwig, by battle experience. All grotle possess the ability to dowse, or to locate sources of pure water based on innate sense alone. Its hardened shell has developed into a smooth, comfortable seat, and using both its dowsing ability and its developed shell, it ferries pokémon that had once been larger than it to these water sources … typically to throw them in as petty revenge for all the times that they had thrown it in when it was a turtwig.

Torterra
The Continent Pokémon
Type: Grass/Ground
Official Registration #: 389
Entry: The evolved form of grotle, by battle experience. After evolution, torterra and their trees continue to grow, and their shells continue to harden. As a result, they grow more lethargic as time goes on, making them slow and large enough for small pokémon to create nests on its back. In ancient times, certain cultures looked to this behavior and concluded that the entire world must actually be on the back of a giant torterra … which is preposterous, as everyone knows that the world is actually supported by four donphan riding on the back of a massive carracosta.