Berry the Cardboard Box theme song

Berry the Cardboard Box theme song is a parody of Perry's theme, as written about Sandy Anderson's imaginary pet. It's a duet performed by Major Monogram and Carl, after the box accidentally lands in Perry's lair, with a fedora on.

Lyrics
Carl: She's an oddly lethargic, packaging product with passion

Major Monogram: She's a corrugated copper, whose body is just a square

Carl: She just stares off into space

Major Monogram: She's got marker ink for a face

Carl: And when she first came, Major Monogram declared:

Major Monogram: We really need to rethink this 'all the agents have theme songs' policy.

Both: She's Berry!

Berry the cardboard box!

Agent B!