Marauders:

"I solemnly swear that I'm up to no good.

I'll never be doing just what I should.

You'll never catch me working up late,

The only appointment I'll keep is a date."

James:

"I'll follow the rules I make for myself."

Sirius:

"I'll leave my school books way up on the self."

Remus:

"I'll waste whole my life having nothing but fun."

Peter:

I'll keep you on your toes or on the run."

James:

"I'll never say no to a late night with Lily,

Being up to no good till the morning gets chilly.

I promise to never tell you the truth.

You can get me in trouble but you'll never get proof."

Sirius:

"I'll ridicule Slytherins and ruin their lives.

I will always jump off the highest of dives.

You can't pin me down for more than an hour.

You may be in control but I got the power."

Remus:

"You won't see me coming at all when I do.

When I tell a lie my eyes tell you it's true.

I'm utterly innocent, or so they all say.

Chain me down tight and I'll still get away."

Peter:

"I'll run and I'll hide and I'll scream like a gal,

But when you turn around I won't be your pal.

Look me in the eye, I'll turn away and cough,

But look the other way, I'll bite your head off."

Marauders:

Of everyone else we will take advantage.

Just one last thing: mischief managed!