added Perry the Platypus' theme song whenever you play as him

(Dooby dooby doo-bah)
(Dooby dooby doo-bah)
(Dooby dooby doo-bah)
(Dooby dooby doo-bah)
Perry!

He's a semi-aquatic, egg-laying mammal of action!
(Dooby dooby doo-bah, dooby dooby doo-bah)
He's a furry little flatfoot
Who'll never flinch from a fray-ee-ay-ee-ay!

He's got more than just mad skill
He's got a beaver tail and a bill
And the women swoon whenever they hear him say

He's Perry, Perry the Platypus!

(But you can call him Agent P.)
Perry! (I said you can call him Agent P!)
Agent P.!