An Elder Secret (Merciless)

An Elder Secret (Merciless) is the first stage in Growing Strange. Beating this stage allows the player to go to a random follow-up stage. There are 7 follow-up stages, each based around a different enemy type, with a 100% chance of yielding an Elder Catfruit Seed and a 1% chance of an Elder Catfruit.

Battleground

 * The stage begins with two Mr. Angels, followed shortly by two Ginger Snaches.
 * When the enemy base is hit, a debuffed Mr. Angel will spawn as the "boss" with a few Ginger Snaches.
 * There are several adversaries inside the base that will only emerge when the "boss" has spawned, including:
 * Two Heavenly Hippoes
 * Metal One Horn
 * Three Pigeon de Sables
 * Two Zories
 * Shadow Boxer K
 * Calamary
 * Berserkory
 * A few of these will appear as support when the "boss" spawns, but not all at once. The only thing that keeps all of them from spawning at once is the low enemy limit. This means that as you kill off the enemies, they get replaced by others.
 * There's a limited number of foes inside the base, so eventually nothing will spawn besides the occasional Ginger Snache.

Reference

 * https://battlecats-db.com/stage/s01162-01.html