Special Stages · Stage 4Aku Studies 501: Inquiry悪魔研究Ⅴ考察Data updated: 2026-07-24100Energy Cost8,930XP Reward1,000,000Enemy Base HP5,400Stage Length12Max Enemies10.2Difficulty Build a lineup for this stage Test your team vs this stageStage rewards100% — Aku Catfruit Seed ×1 · first clearEnemy spawns (9)EnemyStrengthCountFirst SpawnRespawnBase HP TriggerNotesCroconator100%∞0s13.3s~16.7s100%—Deathkory100%113.3s—100%BossAckey100%133.3s—100%—Sir Seal4000%733.3s40s~43.3s100%—Croconator100%566.7s1s100%—Croconator100%5133.3s1s100%—Croconator100%5200s1s100%—Croconator100%5266.7s1s100%—Ms. Sign100%∞900s900s100%—All Empress' Report 5 stages