In "Power Rangers Megaforce," the Super Super Mega Rangers did not directly assist the Megaforce Rangers in their final battle against the Armada for a few reasons rooted in the show's narrative and structure.
One significant factor is that the different teams of Rangers often operate within their own continuity and storyline, which limits the crossover interactions. While crossovers like "Super Megaforce" do allow for some appearances, there are typically narrative constraints that prevent full collaboration in key battles.
Additionally, the Super Megaforce Rangers were engaged in their own conflict and battles, which may have made it difficult for their involvement at that crucial moment. The narrative focus in Megaforce was on the core team and their growth, culminating in their own confrontation with the Armada, emphasizing their struggles and eventual triumph without outside help.
Ultimately, the decision to not have the Super Super Mega Rangers participate could also be a creative choice to highlight the Megaforce Rangers' independence and the stakes they faced alone against the Armada.