Mega Starmie can utilize Aqua Jet as a priority move to secure KOs against foes that might otherwise outspeed it or survive with minimal HP. This move is particularly effective for finishing off weakened opponents, circumventing unfavorable speed tiers. Furthermore, it allows Mega Starmie to directly retaliate against and even counter opposing priority users such as Kingambit's Sucker Punch or Shadow Sneak, which it might otherwise be vulnerable to. This tactical choice transforms potentially losing speed matchups into opportunities for decisive knockouts.