Fearsome Four Of The Dark Dueling World

Fearsome Four Of The Dark Dueling World's History

The "Fearsome Four" were originally a gang of underworld Dueling criminals working under Mr. Heartland. All of them except for Mr. Heartland were recruited as Barians by Vector to aid the former. Mr. Heartland eventually joined them after falling through a portal and ending up in the Barian Sea.

Later in the series, Heartland was eventually revived by Vector using the power of Don Thousand, though his form was that of a fly. Later on, Vector restored Heartland into his normal human form and summoned the other members of the Fearsome Four to accompany him in his journey to take the "Numbers" from Yuma Tsukumo, Reginald Kastle and Kite Tenjo