Underground B61~69/71~79/81~89/91~98F

Boss

• B.B.Bunny 100% magnification HP500 Attack50 AppearsBase HP ≤ 99%

Enemies 4 types

Enemy	Count	Mag.	HP	Attack	First	Respawn
From the start 3 types
B.B.Bunny	Unlimited	3000%	15,000	1,500	0.67s	4–6s
Pigge	3	3000%	45,000	3,600	13.33s	2–4s
Sir Seal	3	3000%	75,000	4,500	40s	2–4s
Once base HP ≤ 99% 4 types
Sir Seal	3	3000%	75,000	4,500	after 26.67s	40–43.33s
Pigge	8	3000%	45,000	3,600	Immediately	20–26.67s
B.B.Bunny Boss	1	100%	500	50	Immediately	—
Fallen Bear	1	150%	112,500	22,500	Immediately	—
Fallen Bear	1	150%	112,500	22,500	after 33.33s	—

HP and attack include the magnification. Identical spawn lines are merged (2×7 = seven lines that each spawn 2). Enemies with a base HP condition start appearing once it is met.

Spawn timeline

Scroll sideways to see more. The number under each enemy is when it appears (seconds). For enemies with a base HP condition, move the slider to set when the condition is met.

An estimate using the game's spawn rules. Ranged intervals use the midpoint, and the on-screen enemy limit is ignored, so when many enemies pile up they appear later than shown.