Phineas and Ferb try to find a way to make everything fun, starting with their house.
Meanwhile, it's Dr. Doofenshmirtz and Perry's 100th battle, and the O.W.C.A. has set up cameras all over Doofenshmirtz Evil Incorporated.
- The Cameo: Suzy and Jenny get a non-speaking one at the pet wash.
- Out-of-Character Moment: The sole purpose of Dr. Doofenshmirts inator, the "Least-Likelyinator".
- Red Eyes, Take Warning: Averted with the platypus from the zoo. It has red eyes so that it can be distinguished from Perry while he's in pet mode, but other than that it's just a regular platypus. However, Dr. Doofenshmirtz might tell you otherwise.