Hearts of Darkness (Merciless)

Enemies

1. From the startHPDamageDPSRange
2. 
   Dark Otter200%

   At 6.7s

   350,00012,99416,949190
3. 
   Tackey200%

   At 23.3s

   256,00018,0004,463400

   hits 600 to 850
4. When the base drops to 99%HPDamageDPSRange
5. 
   Doge DarkBoss10%

   Instantly

   500200146110
6. 
   Razorback100%

   Instantly

   1,150,00020,00046,154145
7. 
   Tackey200%

   Instantly

   256,00018,0004,463400

   hits 600 to 850
8. 
   Shadow Boxer K200%

   Instantly, 6 total, every 10–13.3s

   160,0009,99418,739158
9. 
   Dark Otter200%

   Instantly, 5 total, every 10–16.7s

   350,00012,99416,949190
10. 
    Shadow Boxer K200%

    Instantly

    160,0009,99418,739158
11. 
    Doge Dark800%

    Instantly

    40,00016,00011,707110
12. 
    Tackey200%

    Instantly

    256,00018,0004,463400

    hits 600 to 850

Enemy	Spawns	HP	Damage	Range	Details
From the start
Dark Otter200%	At 6.7s	350,000	12,99416,949 DPS	190
Tackey200%	At 23.3s	256,000	18,0004,463 DPS	400hits 600 to 850
When the base drops to 99%
Doge DarkBoss10%	Instantly	500	200146 DPS	110
Razorback100%	Instantly	1,150,000	20,00046,154 DPS	145
Tackey200%	Instantly	256,000	18,0004,463 DPS	400hits 600 to 850
Shadow Boxer K200%	Instantly6 total, every 10–13.3s	160,000	9,99418,739 DPS	158
Dark Otter200%	Instantly5 total, every 10–16.7s	350,000	12,99416,949 DPS	190
Shadow Boxer K200%	Instantly	160,000	9,99418,739 DPS	158
Doge Dark800%	Instantly	40,000	16,00011,707 DPS	110
Tackey200%	Instantly	256,000	18,0004,463 DPS	400hits 600 to 850

Like most stages, this one also sends a Ms. Sign if the battle goes past 15 minutes.