Meaning of noun + らっけかぁ～

Question

This bolded sentence is from Persona 4, from a random stranger:

酔っ払い上司：ガハハ！

何だお前、噂の幽霊が怖いのかぁ！？

夜中、神社に立って魚を欲しがる白い着物の幽霊らっけかぁ～？

そんなんガキが夜遊びする為の嘘っぱちに決まってんらろぉ～！

(transcript with this sentence)

What does the last part, 幽霊らっけかぁ～, mean? Is this slang?

Answer 1

This person's drunk and his speech's slurred. He's trying to say 白い着物の幽霊だってかぁ～？

This ダ行→ラ行 sound change is commonly seen in drunken speech.

決まってんだろ～！ → 決まってんらろぉ～！

XXです。→ XXれす。
XXだよ。→ XXらよ。