The 'gym challenge'..? So it is something akin to a series of school challenges, for pokemon battling then..

[He'll be taking his onigiri and politely eating it as he looks.] Hm! Then this shall be your fourth- it seems this is a long challenge indeed! [And yet, he grins.] Then Yuzu, I, the man Gongenzaka, shall cheer you on with all my strength and more..!