Niantic is rolling out a sizeable content update to Pokémon Go later this week that will introduce over 80 new Johto Pokémon from the *Pokémon Gold* and *Silver* games, including Chikorita, Cyndaquil, Totodile, and others.
Mantine 226: a Water/Flying Type and a Gold exclusive, so catch two, and try for at least one female to trade to Silver. Mantine levels up slowly, so try using Exp. Share and Lucky Egg. Moveset: Surf, Whirlpool, Waterfall, Wing Attack.