The Murasame Liger was introduced in Zoids: Genesis (2001) and is a custom build of the Liger Zero, specifically designed by the pilot Rukawa. It's a powerful and iconic Zoid, but it wasn't part of the earlier Zoids Vs. series.
Zoids Vs. 3 features the Liger Zero as one of the main Zoids, but not its customized Murasame version.