Natalie and Yahoo Japan News reports the following:
Taiiku Okazaki's New Pokémon ED Song is "Brat Boy, Brat Girl" featuring Sly and Robbie
Starting with the episode airing Thursday February 8th, the ending theme for the TV anime series "Pocket Monsters Sun & Moon" will change to Taiiku Okazaki's new song "Brat Boy, Brat Girl".
This news was announced at the "Next Generation World Hobby Fair '18 Winter" event held today, January 28th, in Makuhari Messe International Exhibition Hall, Exhibition Hall 9 through 11, in Chiba. Okazaki is behind "Pose", the ending theme this anime series has been using since the start.
Okazaki appeared at the "Next Generation World Hobby Fair '18 Winter"'s "World Hobby Fair Stage". Here, he performed the new song "Brat Boy, Brat Girl" for the first time. The entire song was accompanied by reggae music from live instruments provided by the Jamaican rhythm section Sly and Robbie. The arrangement was handled by Satori Shiraishi, who also worked on the song "Natural Lips" for Okazaki's second album "XXL".
Source:
https://headlines.yahoo.co.jp/hl?a=20180128-00000028-natalien-musi