Is Swellow or Xatu stronger in Pokemon Emerald?

In Pokémon Emerald, Swellow is generally considered stronger than Xatu in terms of offensive capabilities. Swellow has a higher base Speed and Attack, allowing it to outspeed and hit harder against most opponents. While Xatu has decent Special Defense and access to useful moves, its lower overall offensive stats and less favorable typing make it less competitive compared to Swellow in battles.