This Hoenn champion and gym leader duo are friends. The two work with one another as members of the league but also in dealing with Teams Magma and Aqua as they try and succeed in awakening Groudon and Kyogre. Wallace hints that Steven watches him compete in contests which further shows their friendship.
— In the games —
— Fan art —
My thoughts — Not including Pokéspe in this because it's too sad. But yeah, this is probably my top ship for Steven.