One Two Switcheroo! is the second half of 35th episode of Season 1 of Nella the Princess Knight.
When Trinket and Olivia are turned into icky lizards, Nella and the gang must find the antidote.
1. This is the first time Olivia transforms into a animal.
2. This is considered to be the worst episode of the show. (Due to Trinket and Olivia turning into icky lizards.)