Ninja is a multielement, looping coaster that is unique since the design was started by Arrow Dynamics, but finished by Vekoma, after Arrow filed for bankruptcy. The coaster originally operated at the Vancouver Expo before being relocated to Six Flags St. Louis.
1989 – Relocated from Vancouver Expo and renamed Ninja.
1986 – Scream Machine opened at Vancouver Expo (Vancouver, British Columbia, Canada).
Train has seven cars with two rows each, seating two abreast per row.
Height requirement: Riders must be at least 48 inches tall
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