Buzz Bomber Achievement
Hit 1st, 2nd and 3rd place with a Swarm attack
More luck than anything. Choose C class and try to make sure 1st, 2nd and 3rd are in a tight space such as the narrow corridors in burning rangers, the beginning of panzer dragoon, or tricky corners like the monkey ball stage when drifting towards the boat section. There are many places to obtain this.