Here is the sentence which includes the word.
あたし エラフィタの近くにいる かまっちって 魔物がときどき落とすよるのとばりが どーっしても必要なの!
In my understanding, it comes from 構う{かまう} which mean to concern about. However, I cannot find the reference about 「っちって」.
かまっち is just the name of a monster in DQ9 (かま is 鎌, and -っち is a kind of suffix). って is a colloquial version of という.
かまっちって魔物
monster called Kamatchi