X Strait Y Scenery was the first ending for "Pokemon The Series: XY" in Japan, and was included in the album "ポケモンで踊ろう with J☆Dee'Z" (Let's Dance with Pokémon with J☆Dee'Z), by Sony Music Records.
The original video is unfortunately not available on Youtube because of copyright, so a screenshot was used in its place.

This download contains two difficulties:
Normal 4.5☆
Hard 6☆

As with any custom chart, you may have to adjust the offset.