James Flynn-Fletcher

 James Flynn-Fletcher, also known as 'The Friendliest Lion in the World', 'James the Lion' from Doofenshmirtz, and, once, 'Agent L the Second' from O.W.C.A: 'Organization Without a Cool Acronym', is Candace's pet, gentleman-like, talking lion (even though he hates being called a pet). He loves all his family, and doesn't like it when they're having arguments. He is also best friends with Perry the Platypus after he finds out that he's a secret agent.

Despite being a family-loving animal, he is rather clumsy and bad things happen to him quite often. He also has a huge fear of water, like most cats do, and sometimes boasts about how great his mane looks and that nothing can scare him (besides water). His day usually involves him helping Phineas and Ferb build their inventions despite Candace telling him not to, sometimes trying to scare people with his roar, and sometimes sleeping on the ground.