Sightseer SR and Red's Challenge from has been revealed from SM12a Tag All Stars. It was spotted on a promotional poster. Earlier this Sunday, more SR cards have been revealed. Red's Challenge SR is illustrated by TOKYA and Sightseer SR seems to be illustrated by Naoki Saito, which designed this character for the Sun & Moon games.
Stay tuned for more reveals this Friday and all SR cards next Wednesday!
Thanks ToineLay for spotting them!