Can I use LWRP and Legacy renderer togather

Hello experts,
I am using LWRP in a few new Games that run on a platform having many games. The previous games are all stored in AssetBundles and the old copies are lost with time*(I know Backups were not properly stored and many people used their personal systems to keep a local backup and some have quit over time)*.

So what I want to do is, I want my new games to run on LWRP that I will create henceforth, but the old games that download all materials and textures from old asset bundles must run on the old legacy pipeline.

My understanding is that Unity allows writing custom pipelines. Is there any way to get old asset run on the legacy pipeline and still port the new games to use LWRP?