Your heart's beating around the clock
Time ticking away, it doesn't stop

Evolution is taking place
The world is spinning and changing
Every day

Anything you think of with a name
There isn't anything alive
That ever stays the same

Everything changes, changes
Things are changing constantly
Everything changes, changes
It's evolutionary
Everything changes, changes
Changin' all the time,
Playing with your mind
Might have to rearrange
Everything has got to change

You take a chance, you throw the dice
You just keep on, it's just a part of life
You hold on tight to what you know
You can't hold back, you've got to let it go

Every little step that you embrace
One road ends, another begins
And takes you to a better place!

Everything changes, changes
Things are changing constantly
Everything changes, changes
It's evolutionary
Everything changes, changes
Changin' all the time,
Playing with your mind
Might have to rearrange
Everything has got to change

Brock: It's changing!

Misty: Your Metapod is evolving!

Ash: Hahah, woah! My Metapod evolved into a Butterfree!

Pikachu: Pikachu!

Everything you think of with a name
There isn't anything alive
That ever stays the same

*repeat main chorus to fade, amidst frenzied shouts of "it's got to change" and the like

Thanks to Unknown