When We Didn't Get Along is the song from the Phineas and Ferb episode “It’s About Time!“ The song describes Perry the Platypus's feelings after his nemesis, Dr. Doofenshmritz, stops fighting him in favor of Peter the Panda. It is revealed how much Perry's nemesis means to him. Unlike most songs in the series, the singer of this song is not shown on-screen.
Lyrics
Without your schemes my life, it seems, is empty
I spent all my time keeping you from doing wrong
You were my only nemesis
I'd foil your plans, but still I miss
The moments when we didn't get along
So search your heart, please, Doctor D
And I am sure that you will see
That you were always meant to be
My only lifelong enemy
But now you're doing battle with a panda from Seattle
I miss the moments when we didn't get along
Ooh.
Extended version
Without your schemes my life, it seems, is empty
I spent all my time keeping you from doing wrong.
You were my only nemesis
I'd foil your plans, but still I miss
The moments when we didn't get along
I fell for you the moment that you pushed me
You captured me and held me for so long
But now you're doing battle with a panda from Seattle
I miss the moments when we didn't get along.
So search your heart, please, Doctor D
And I am sure that you will see
That you were always meant to be
My only lifelong enemy
You gave my life heroic cause
Back when my only mission was
The moments when we didn't get along.
Ooh