There is a shiny Oshawott in Pokémon Go. But like Snivy and Tepig, we must ask the question: why did they bother? Oshawott has a branching evolution, with regular (Unovan) Samurott being a Water ...

For Master League, you're looking at Oshawott’s evolved form Samurott. Tepig's evolution ... As you can see below, shiny Snivy is very subtle, simply swapping its greens for teals.