It doesn't exactly describe 2 specific yami and hikari, so whether it's for Yugi and Yami or Ryou and Bakura is your guess.
Two as one, as one as two.
Darkness and Light are nothing apart,
Yet they are separate beings.
The Darkness lives on within every shadow
As the Light shines forever amidst those pure and innocent.
The two have always lived together, yet apart.
Only trust can bond the two together.
For even the darkest parts of one's heart has a spark.
Hidden deep within it waiting to be lit.
One might not suspect it,
But it will always be there as long as the Light exists.
Unknown to either it might be,
But there it will always stay.
Waiting to be discovered.
Separate, they are nothing,
But as one,
They are truly strong.
Able to tap into their full potential.
Together, they will overcome any obstacle.
Even the toughest of challenges can be beat.
Light can not live without Darkness,
As Darkness can not live without Light.
They bring balance and equal-ness to each other.
The laughter of the innocent,
To the bravery of the mighty.
Together, side by side they will bring out the best with in them.
When the two come together,
Then one's life will finally be complete.
Even the most different can be one,
As like the Darkness and Light who possess this body.
