Dandy
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Are you talking about the battle with Sir Lock? I still don't understand what makes him so important. Sure, if we don't get to the Le Strada area, we won't get the rusty dragon, we won't capture the Nidarock castle, and we won't get the crystal dragon lairs. But how does that fundamentally affect anything? If crystal dragons were needed somewhere, then yes. But they aren't needed anywhere.
1) It's some kind of Easter egg. If you find it, good for you. If not, it's not critical for completing the game.
2) The author got confused and lost the plot thread of the quests.
But who's going to figure out these authors...