The Average ZL Stage:

Enemies:
Primeval Cyclone (200%)
Ms. Sign (14,000%)
Sun Doge (2,000%)
Fire Cracker (4,000%)
Boulder (4,000%)
King Mola (4,000%)
Sardine (8,000%)
Metal Hippoe (100%)

Base Health: 276,313,333
Enemy Limit: 30
At The Start:
Primeval Cyclone Spawns

When Base Reaches 99% Health:
Ms Sign Spawns as the boss
Infinite Boulders (Delay 3~5 seconds)
Infinite Fire Crackers (Delay 1.67~3.33 seconds)
Infinite Sardines (Delay 3~7 seconds)
After 1 second king mola spawns as the boss
After 1 second, sun doge spawns as the boss
After 14 seconds, another sun doge spawns as the boss.
Infinite Metal Hippoes (delay 12,000~13,000 milliseconds)
After 30 seconds, infinite firecrackers spawn(delay 0.01~0.2 seconds)