Sure! Here's the requested content in spun format with synonyms:
Cathy
loves Phineas and Felix.
Candace Phineas, and also Foster.
Fred Cathy, and also Felix.
Cathy finds joy
in being with Philip and Ferb.
Fred
means the world to Cassandra, and Frank.
Cara shares a bond with both Phineas and Frank.
I hope you find these variations helpful!