Indeedee's best moveset in Pokémon GO is Extrasensory and Psychic, with 13.75 damage per second, and it can deal 293.6 damage before Indeedee faints. This is true when battling in neutral weather.
All Indeedee movesets ranked
Here is a complete list of Indeedee movesets in Pokémon GO, ranked by their DPS and TDO. You can change the weather and the opposing Pokémon.