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Biography

Dex Oyama, known as Dekao Oyama (大山 デカオ Ōyama Dekao) in Japan, is a character from the Mega Man Battle Network series. He is Lan's rival and GutsMan.EXE's operator. He has a little brother named Chisao, that believes that Dex is the best Operator in the world; and Dex tries desperately to maintain his respect. Although his skill never quite allows him to defeat Lan, he is nonetheless a dedicated Netbattler who frequently ranks highly in several competitions and provides key assistance in a handful of incidents.