Saikyou Ginga Ultimate Zero: Battle Spirits is an anime inspired by Bandai's Battle Spirits trading card game and produced by Sunrise. It is not related to any previous Battle Spirits anime work. Rei is an adventurer called a "Card Quester." He wishes to collect strong cards scattered throughout space, and a battle with his rivals unfold. (Source: Battle Spirits Wiki, ANN)
Watch Battle Spirits: Strongest Galaxy Ultimate Zero episode 1 online — subbed and dubbed, with automatic AniList / MyAnimeList progress sync.