When the children learn that Dr. Colosso ruined their parents’ wedding years earlier, they decide to recreate Hank and Barb’s dream day as their anniversary gift. (from imdb.com)

This is a funny episode but I think we have gone to the “birthday party/anniversary well” too many times. Furthermore, we have had too many stories with Max trying to be an equal contributor to the Phoebe/Max Z Force application.
That said, we start off with Phoebe trying to arrange for an anniversary gift for Hank and Barb (the trick about using brownies to call a meeting is amusing). When asked about wedding photos, Hank and Barb defer, but finally tell the story about how Dr. Colosso turned them into goats at their wedding. Hence no pictures (although the could have taken some afterwards.)
Phoebe et al decide to recreate Hank and Barb’s wedding. Hank and Barb are thrilled with the invitations – but Dr. Colosso is on the case to ruin this wedding as well. He sneaks into the house and gets in where the Animalyzer is (wouldn’t you have moved it?). Turning himself back into a human, he then turns the kids into animals. In the end, Colosso is vanquished, the kids turn back into themselves and the wedding goes on.
Overall, I didn’t find this a thrilling episode and lost interest in the middle of it. You can do better Thundermans!