Here's a breakdown:
* Episode 1: Usagi Tsukino first meets Luna and discovers she is Sailor Moon, gaining basic magical abilities and the power to transform.
* Episode 2: Ami Mizuno becomes Sailor Mercury, gaining her own transformation powers and abilities.
* Episode 4: Rei Hino becomes Sailor Mars, receiving her powers.
* Episode 6: Makoto Kino becomes Sailor Jupiter, gaining her magical abilities.
* Episode 10: Minako Aino becomes Sailor Venus, although she had already had some powers and experience fighting before joining the other scouts.
While each girl discovers their powers individually, it is only after they gather as a team that they truly become powerful and united. They learn to work together and rely on each other, developing their strength and skills throughout the series.
It's not a single episode where they all suddenly become "super," but rather a gradual progression of their individual and collective abilities.