When the enemy base is damaged, Lord Enma will spawn as the boss alongside Sunny Celeboodle, Leggsy, Bearkini and 5 more of each Ecto Gang member. After killing the 15 Ecto Gang members that spawned with the boss, Gory Groom will enter the fray. Bearkini respawns up to 4 times after ~30 seconds each.
This stage is quite easy for a merciless stage. The Ecto gang can easily be stalled by a single lvl 20 Manic Eraser Cat. This allows the player to build up money and stack heavy hitting cats i.e. Bahamut Cat or Shishilan Pasalan before the base is hit and the boss enemies start to spawn.