In Kamen Rider Zi O (2018) during the Kiva episodes: Ep 35: 2008: First Love, Wake Up! Ep 36: 2019:First Love, Finally! One of the three Armed monsters from Kamen Rider Kiva (2018) - Jiro, a prominent side charater in Kamen Rider Kiva, makes a guest appearance in these episodes as a homage to the Kiva (2008) series.