The Mutant Foot Soldiers appeared in Turtles Forever.
Ch'rell the Utrom Shredder and his followers have overtaken the Technodrome from the 1987 TMNT cartoon dimension. Besides disposing of the outdated Foot Soldiers and replacing them with more updated versions, Ch'rell has also taken control over the utilization of the Mutagen in Krang's reserves including the sample that got onto Hun. A vast amount of Ch'rell's Cyber Foot are turned into Mutants for his disposal against the Teenage Mutant Ninja Turtles. The Mutant Foot Soldiers were mutated into their mutant forms without coming into contact with a living thing.
- Almost all mutant foot soldiers have three fingers in each of their hands, just like the turtles do.