A crossover between ’’Kamen Rider Decade’’ and ‘’Kamen Rider W’’.
The first third, “Decade: The Last Story” acts as the Grand Finale of Decade, picking up shortly after the series’ Cliffhanger. Tsukasa, having accepted his role as the destroyer of worlds, goes on a rampage while Natsumi and Yusuke try to stop him.
The next segment, “W: Begins Night,” expands on what happened the night Shotaro and Philip met as the duo deal with the seemingly revived Sokichi Narumi.
Naturally, both segments end up meeting in the final third of the film.
The movie contains the following tropes:
- Back from the Dead: Decade’s death revives all the Riders he killed. Decade himself is revived soon after.
- Call-Back: Decade and W remember each other from the last time they met.
- Curb-Stomp Battle: Decade easily defeats every Rider he comes across. Justified since he spends the entire “hunt” in his Violent Emotion form, which makes him much more powerful than normal.
- Dead All Along: Yuriko Misaki.
- Heroic BSoD: Shotaro has these when facing Skull.
- I Let You Win: Decade holds back in his fight with Natsumi, allowing her to kill him and causing the other Riders to revive.
- One-Hit Polykill: Decade takes out Super-1 and Kabuto this way.
- Origins Episode: The film expands on what happened on Begins Night.
- Taking You with Me: Yusuke tries this with Decade but fails.
- Well-Intentioned Extremist: Decade does what he does during the movie to ultimately save the other Riders from permanent death.
