Botta is a Desian commander and a challenging boss at the Palmacosta Human Ranch. He is a strong physical attacker and can use some dark-elemental techniques. He has no specific elemental weakness, so focus on raw damage. Lloyd and Kratos should be your primary damage dealers, using their strongest Tech Arts. Genis can use his most powerful non-elemental spells or spells that the current party members are strong against. Raine's healing is crucial here; Botta hits hard. Be prepared to use Life Bottles if a character falls. He has a powerful attack called Dark Sphere that can hit multiple characters. Try to interrupt his casting if you see him preparing it. Maintain consistent pressure and keep your HP high.
