I saw speed freak comment using this. Lets say neither were EV trained at all, what would be the total damage it would do on the fifth turn?
481,266,036 damage max. Although technically it would do only as much as the HP of Ledyba. See Mew's answer http://pokemondb.net/pokebase/51228/what-is-the-most-amount-damage-any-pokemon-could-do-to-another