Swellow (Japanese: オオスバメ Ohsubame) is a Normal / Flying-type Pokemon pokémon introduced In GENERATION. Iii swellow evolves From taillow at level. 22wellow flies high above our heads, making graceful arcs in the sky. This Pokemon pokémon dives at a steep angle as soon as it spots its. Prey the hapless prey is tightly grasped By’swellow s clawed, feet preventing. escape