So let's discuss Peach's Castle 64. It was a counterpick in SSB64 so we should prepare for it being one in this game.
What do we think about the stage for Pit? Early impressions for me is that playing with the ledges on the moving platforms on the bottom is dangerous with our linear recovery. Reminds me of pre-patch Lylat Cruise in that we have to be very careful and very aware of firing where the stage is moving, not where it's at.
Not sure how viable it is, but if we're accurate, sourspot DAir can stage spike off the bottom of the slanted floating platforms.
For Dark Pit, I couldn't get Electroarm to consistently ricochet regular Pit off of the slanted platforms on the topmost flast platform. The only time I could get it done was with Pit 1 standing at the lowest point of the decline of the railroad tracks on the right side of the stage. The richochet occurs from 110% and above. And yes, you can tech off of these platforms. But overall, it's not a huge issue to be concerned about on that level.
For the lower level, I ricocheted Pit off of the left slanted platform at 100% with the Electroarm. This occurs on the checkerboard part of the lower platform as well as on the red stairs on the left. The opponent won't make contact with the platform if you Electroarm him from the right red platform. I assume the same is true for the opposite sides since they're symmetrical. So be cautious when using the Electroarm on the middle the lower level.
And yes, these platforms do move.