Robotrek/YMMV


 * Breather Boss: Bug Bug, both times.
 * Game Breaker: One item, creatable from about the game's mid-point, is a backpack that heals your robot each turn. Get it, and max the bot's Defense, and losing becomes basically impossible.
 * That One Boss: Being an Enix game, the list that aren't these is smaller.
 * Meta Crab: A "Wake-Up Call" Boss if anything. Long range attacks don't work on him, even the easily spammable big-bang attack.
 * Mamurana: Not only does she do moderate damage, but she constantly splits into clones.
 * Big Eye: He hurts. A lot. If you wasted your Scrap 9 on something other than Shield4, this is effectively a stopping point in the game until grinding takes over.
 * Black Tank: Continues the trend that Big Eye started.
 * DeRose: The poster child for this trope. She has the most HP in the game aside from the final boss (About 5000), a confusing laser attack, a powerful nuke attack, and essentially an instant death melee attack. It's also impossible to do more than Scratch Damage unless Axe 3 is used with the triple hit combo, and all three have to hit. The fight is trying to hurt her faster than she can deplete your stock of Cures.