Sowser is the older brother of Bowser and uncle to the Koopalings. He is very powerful and his fireballs are blue. He is a secret boss in New Super Mario Bros. Wii in a secret world. Sowser rules Bowser and he has 8 children just like Bowser but they are more powerful than the Koopalings, so they are called the Loopalings. Sowser is sometimes refered to as Lord Sowser or Lord Koopa. Sowser will appear in Family Battles: Bowser vs Sowser. The reason why he hates Bowser is because their father Morton Koopa Sr chose Bowser to be the heir to the throne of Dark Land instead of him.

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