Kamen Rider 555: Hyper Battle Video

Kamen Rider 555: Hyper Battle Video (仮面ライダー５５５（ファイズ）　ハイパーバトルビデオ) features a boom box called the Faiz Sounder developed by the Smart Brain corporation appearing at the laundromat where Takumi, Mari, and Keitaro work at, causing them and everyone else to break into song and dance. The Faiz Sounder was created as a result of a contest for Televi Magazine for a new weapon for Kamen Rider Faiz.

Summary
The video starts out with a regular day with Takumi, Mari and Keitaro suddenly turns into a musical number thanks to a mysterious new boom box created by Smart Brain. As it turns out, Yuji, Yuka and Naoya has the same boom box and are greeted by a rapping Smart Lady who reveals that it's part of a new plan by Smart Brain to invoke people into singing all over Japan. The reason: To get the three Rider Belts back. After a recap opera covering the abilities of the Faiz, Kaixa and Delta Gears, Takumi and Mari are suddenly transported to another dimension of sorts with Yuji, Yuka and Noya now in flashy outfits and Smart Lady still rapping with three revived Orphenoch. A fight breaks out between Takumi and the Orphenoch in a West Side Story-like dance sequence before Takumi transforms into Faiz. Smart Lady tries to stop him but to no avail.

Mari then reveals the Faiz Sounder, the boom box that Smart Lady had been using as part of the plan and hands it to Faiz. After inserting the Mission Memory, the boom box converts into two cannons which Faiz uses to finish off the Orphenochs. Smart Lady begs to be with the winning side as they did the closing number without her. In the end, it turns out that the whole ordeal was nothing more than a dream that Takumi was having while Mari and Keitaro are cleaning and humming.

Contest
The whole video itself was sparked by a contest running in TV Magazine where readers could submit designs for new weapons for Faiz. The winner would have their weapon illustrated by professional artists for the magazine and it would appear in the Faiz Hyper Battle Video. In this case, the winning design ended up being the Faiz Sounder and thus, the plot of the video was created around it.

Trivia
This would be the last Hyper Battle Video released on VHS. From Blade onward, the installments would be released on DVD.