Tales of Symphonia Lost before Aska and Luna summon spirits

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Im actually going crazy, I feel like I have all the summon spirits already yet I can't fight Aska and Luna

Is there like a list of the summon spirits I need before I fight them? the Synopsis menu doesn';t help me at all

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Check Sheena’s artes, I can help you from there

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Sheena’s got Summon: Fire, Wind, Water, Earth, Ice, Lightning

[untold shadow]

Go south of Meltokio, there’s something tucked in the mountains there I think you’ll find interesting