Rosalina is a pretty tough fighter to face in battle, but Samus is ready for her. Samus has a large arsenal of weaponry at her disposal and her speed is enough to outrun Rosalina’s kart. Rosalina can fly, but Samus has booster packs that can quickly close the gap between them. Samus also has her spaceship which can help her in deep space combat. Either way, Samus has the edge in this round. Samus wins.