plot explanation - Why is the white ranger's transformation different in Power Rangers Dino Thunder?

In href="http://en.wikipedia.org/wiki/Power_Rangers_Dino_Thunder" rel="nofollow">Power
Rangers Dino Thunder the Red, Yellow, and Blue ranger don't transform when
they first touch a Dinogem. Tommy Oliver modifiest their gems to morph them into
rangers. However, Trent Mercer, the White ranger, was instantly transformed by touching
the white gem.

Why was the white ranger's transformation
different from the others? Or i missed something?

Answer

The
rel="nofollow">Power Rangers Dino Thunder wiki page has this to
say:

Tommy (known often as
Dr. O) himself joins the team as the Black Dino
Ranger, and they are also
later joined by Trent Mercer as the White
Dino Ranger, with the powers of
invisibility and camouflage,
respectively. Trent must deal with the inner
struggle of good and
evil, as Tommy himself once had to do as the evil Green
Ranger, due to
the fact that he gained his powers from a raw Dino Gem in
Mesogog's
lab, with the powers originally intended to be
Mesogog's.

I haven't actually
seen the series, but this passage leads me to believe that the Dino Gem that Trent found
wasn't exactly the same as the other two, and that's why his transformation is
different.