ArtStation - Pokemon XY Sprite Project Megas (2013-2016, 17 sprites)

ArtStation - Pokemon XY Sprite Project Megas (2013-2016, 17 sprites)

ArtStation - Scylla (September 2020)

Falgaia

ArtStation - Mega Altaria

Sticky - X/Y Sprite Project, Page 133

ArtStation - Pokemon XY Sprite Project (2013-2016, 34 sprites)

ArtStation - Pokemon XY Sprite Project QC (2013-2016, 42 sprites)

ArtStation - Pokemon XY Sprite Project QC (2013-2016, 42 sprites)

ArtStation - Pokemon XY Sprite Project (2013-2016, 34 sprites)

Smogon University - Sprites made by the XY Spriting Team for Pokemon Showdown! Source

ArtStation - Pokemon XY Sprite Project Megas (2013-2016, 17 sprites)

ArtStation - Pokemon XY Sprite Project (2013-2016, 34 sprites)

ArtStation - Pokemon XY Sprite Project QC (2013-2016, 42 sprites)