Which transformation are we talking about?
if it's the henge-no-jutsu (Transformation Jutsu) in which Naruto uses in order to transform into a naked woman in order to stun his foes, this is done in episode 1.
If we are talking about the Kyubi transformation, it's on episode 15-16, when Naruto thinks Sasuke's dead.
I think it's episode 107 or around it.
First time they are seen thogheter is in episode 32
In Naruto Episode 52: Ebisu Returns: Naruto's Toughest Training Yet!
The first time he appears is episode 135 as a hologram
The first episode of Shippuuden or 221 if you do a total count.
Sora transforms in "Naruto Shippuden" Episode 151, titled "Return of the Morning Mist." In this episode, he uses his powers as a jinchuriki for the first time during a battle against the Akatsuki. His transformation showcases his struggle with his inner demon and the challenges of wielding such power.
well, naruto shippuden episode 1 has sai in it, but only because it is a preplay of the future. the first time that naruto actually first meets sai is naruto shippuden episode 33 or 34.
No.2 of season 1
I think it's episode 107 or around it.
First time they are seen thogheter is in episode 32
that's episode 51 watch it here http://narutovideoseries.com/naruto-shippuuden-51-reunion/
The episode you are referring to is "The Denman Affair," which is the 11th episode of the first season of H2O: Just Add Water. Will sees Bella transform into a mermaid for the first time during this episode.
He uses the complete version for the first time in episode 94
Right before the Cunnin Exams, in episode #20. ^^
Naruto did,thats first time he used RasenShuriken- episode 88! Amazing :D
In Naruto Episode 52: Ebisu Returns: Naruto's Toughest Training Yet!
The first time he appears is episode 135 as a hologram