In the novelization of Pacific Rim, Mutavore fought Echo Saber and Vulcan Specter. In Pacific Rim: Aftermath, Mutavore fought and destroyed Vulcan Specter.Pacific Rim establishes Mutavore never fights any Jaeger other than Striker Eureka. Additionally Travis Beacham states that Mutavore never fought any Jaegers before breaching the wall.
↑Travis Beacham: "[...]Mutavore. Cat-3, I think. The design was dubbed "bladehead" before it was decided which designs would be which kaiju."
↑"Less than an hour ago, a Category III Kaiju breached the Sydney barrier." In the middle of the sentence, shaky cell-phone footage of the event replaced the image of the reporter. A scrolling feed along bottom of the screen identified the Kaiju as Mutavore." Pacific Rim: The Official Movie Novelization, page 48