Andy's Wartortle

Andy's Wartortle is a Pokeon Andy obtained during his travels in Kanto, it is his last obtained Kanto Starter Pokemon.

Kanto Arc
Andy's Squirtle is a Pokemon Andy obtained shortly after arriving in Cerulean City, he got it from a Diglet Farmer who didn't need it because he only had Diglet's and water type moves would effect it. He made a deal with Andy he would give him his Squirtle for Andy's Dugtrio.

Trivia

 * Wartortle is Andy's only Kanto Starter that hasn't fully evolved.
 * Wartortle is the first Pokemon of Andy to refuse for unknown reasons, the second is Cyndaquil.