During the September Nintendo Direct, Nintendo announced that the Castlevania Advance Collection was heading to the Switch that same day, September 23rd. The Electronic Software and Ratings Board has already rated Castlevania Advanced Collection for PS4, Xbox One, and PC, so it looks like it might be heading to those platforms as well. This is the second time the collection has shown up on a ratings board, the first time showing up on the Australian ratings board back in June.
The collection includes three games in the series that were released on Game Boy Advance, including Castlevania: Circle of the (2001), Castlevania: Harmony of Dissonance (2002), and Castlevania: Aria of Sorrow (2003).
The Taiwan Digital Game Rating Committee also listed Castlevania: Dracula X as one of the games in the collection, which the ESRB has seemed to confirm as well, since it notes “this is a collection of four classic Castlevania games.” Dracula X could be the original PC Engine Rondo of Blood version or the one ported to the SNES as Castlevania: Dracula X.
The cover art for the collection also appears to be Circle of Moon’s art, but with the “Advance Collection” title on it.