Kamen Rider × Kamen Rider Fourze & OOO: Movie War Mega Max
Through their research into the Gaia Memories and partnership with the Museum, Foundation X was able to mass-produce Masquerade Memories for their own use. The standard black Masquerade Dopants served as henchmen for the Foundation alongside the Waste Yummies and Stardust Ninja Dustards produced through the Cell Medals and Cosmic Energy respectively. Some members of Foundation X also carried their own Masquerade Memories which allowed them to transform into Masquerade Dopants while retaining their white suits.
Movie War Ultimatum
Several Masquerade Dopants were among the Monster Army spearheaded by the Akumaizers. The army was wiped out by a gathering of eight Heisei Riders. Kamen Rider × Kamen Rider Wizard & Fourze: Movie War Ultimatum.
Kamen Rider Wizard
Three Masquerade Dopants were among the monsters in the world within the Magic Stone ruled by Amadum. They were sent along with a trio of Stardust Ninja Dustards to capture a young boy and girl and the 13 Rider Rings they were carrying. They were countered when the boy summoned Double and Fourze to fight them. The Riders assumed HeatMetal and Elek States temporarily, defeating the Masquerade Dopants before finishing off the Dustards in the city as Faiz and Kabuto destroyed a trio of Worms.
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