McGuire, Molly

When Phineas and Ferb discover that their grandma used to be a roller-derby queen and that Jeremy Johnson's grandma was her skating rival, they build a rink and hold a contest between the two. Includes black-and-white illustrations.

After finding out that both their grandmother and Jeremy Johnson's grandma used to be skating champs, Phineas and Ferb build an awesome rink right in their backyard, and they set up a contest to see which granny can roller derby their way to the finish line the fastest.