From "Mario and Luigi's Big Exodus".
Ever since people love "Moe and the Big Exit", some love Mr. L to portray the Lone Stranger. So Mario,Mr. L and Toadsworth set on their journey to meet the Pharaoh Bowser. Mr. L aided the power of God to send ten plagues on Egypt and its gods.
Just what the Bible said, "Egyptian Gods are powerless against the plagues".