Politoed

It gathers groups of others as their leader. Its cries make Poliwag obey.

Poke-BODY — Enthusiasm: If you have Poliwag, Poliwhirl, and Poliwrath in play, each of these Pokémon's attacks does 60 more damage to the Defending Pokémon (before applying Weakness and Resistance).

Frog Hop (40+): Flip a coin. If heads, this attack does 40 damage plus 40 more damage.