Raveien

Hello! Firstly, thank you so much for creating such an amazing rom hack, I love the PMD series so much and seeing such a brilliant revamped version of it has been fantastic! Just have a question, I've been waiting for Giant Volcano to unlock, to get the 7th treausre, the Fiery Drum but I realsied I already have the Fiery Drum and Mt Blaze has replaced Giant Volcano, but I'm not getting a boss fight with Moltres? I went back through Mt Blaze just now, got to the top and got given another Fiery Drum. I've checked my recruited Pokemon list and I have Zapdos and Articuno, but no Moltres? Any ideas? (Also side note, Heatran was previously the guardian of Giant Volcano, where can I find it?) Thank you