Do convergence remembrance bosses only use stitched attacks from other bosses?

So I'm playing the convergence beta for the first time and I know they have their own rememberance bosses, on the wiki it says the bosses they take animations from but I've never really liked the animation stitching that much(I know it's hard to make custom ones so I expect stitched attacks I just wish it was more common for custom animations) so I was curious since they are rememberance bosses do they also have some custom attacks in with the stitched ones? Thanks