*In the style David Attenboroughs voice*
The Tympole is an extraordinary creature that lives alone in the pond, spending most of it's life there until the time comes for it, where it evolves into a Palpitoad and will literally walk out of the pond that it had spend most of its life time in. Then it's journey starts where it will be immediately be captured by a Pokémon trainer and be forced to spend the rest of it's life to appease its trainer in deadly combat against other ferocious creatures.