I want to know the answer to the following question:
What represents Apollo as a Northern intruder?
All the background I'm provided with is that "The connection with Dorians and their initiation festival apellai[clarification needed] is reinforced by the month Apellaios in northwest Greek calendars, but it can explain only the Doric type of the name, which is connected with the Ancient Macedonian word "pella" (Pella), stone.". Is that enough to answer the question?
Answer: no