Third time's the charm. Or so they say. But it works for you as the pokeball absorbs the Ekans without a hint of a struggle. But as you're about to collect your 7th team member, the ball teleports away. The Box System has kicked in, it seems.
SpoilerEkans, Level 10, Female, Adamant, Intimidate. 50% HP.
300 XP for both. Shared between Ganga, Maia, and Rhea.