Why is there no complete collection of Kamen Rider Diend?

Diend is the second rider in "Kamen Rider Decade" in 2009. He is a supporting character, so he only appears in "Kamen Rider Decade", so there is no complete set.

Kamen Rider Diend, a Kamen Rider developed by Overhaul in "Kamen Rider Decade", can use the Diend Driver to summon other Kamen Riders to assist in combat and has its own acceleration ability. It was originally the other trump card of Overhaul Card, but it was stolen by Haidong Dashu and used by himself. Basically a Kamen Rider who steals in a different world.

"Kamen Rider Decade" will be screened on TV Asahi from January 25, 2009, and will be broadcast every Sunday morning at 8:00-8:30. Toei, which produced this special feature film, named the new protagonist Kamen Rider DECADE, which means "decade" to commemorate the 10th installment of the Heisei Kamen Rider series. Viewed from the front, there is a "ten" on the upper right side of Dede's body. This film tells the story of Kadoyaji, who can transform into Decade and travels to the worlds of various knights. He keeps traveling in order to find his own world.

This is a "Kamen Rider about Kamen Rider", which is also a post-Kamen Rider. The story of Decade is centered on traveling through time and space, so Kamen Riders from nine works including Kuuga, Agito, Ryuki, 555, Blade, Hibiki, Kabuto, Den-O, and Kiva will also appear in this drama and become the selling point of this drama. one.

At the same time, this work is also the first time that the Kamen Rider series has collaborated with the Super Sentai series.