Robot Hell On Earth/Boss Fights

During the Robot Hell On Earth event during Part 2 of The Robot Devil You Know Goal, Robot Devil spawns with 2000 and 24 hours given to defeat him. The gameplay is very much like space missions. 5 characters can be selected to enter the fight. Bombs can be used to help defeat enemies. Robot Devil has the special ability to spawn new enemies. Spell Bombs stop new enemies from spawning for 3 turns. Robot Devil will only take damage when there are no other enemies protecting him. Once defeated, Robot Devil re-spawns in 4 hours or can be instantly re-spawned with 40.

How to Play without Bombs:
High level characters (20-25+) are helpful. Add 1 high level Robot, 1 Villain and 2-3 Influencers  to your party. The Robot Devil can be only be damaged when the row of enemies closest to him is empty. Defeat this row first, then the Robot Devil (to stop it spawning new enemies), and finally the second row of enemies.

Use the Robot defense boost one time. Use the Villain's special ability (Enemy defense reduction) every time it refreshes. Use the Influencers periodically to heal. Also, if the battle is lost, simply battle again. Players are given a 24 hour window to knock down the 2000.