Electrodes are a kind of "collar" used in underground duels. They were first shown when #REDIRECT [[Zane Truesdale]] (aka Kaiser Ryo) dueled against "[[Mad Dog]]" in an attempt to gain more power. When a duelist loses life points while wearing an electrode, a severe electric shock is sent through their body causing them great pain. After his duel with Mad Dog, Zane (Now known as Hell Kaiser Ryo in the Japanese version) used them again in a duel against his younger brother [[SyrusYu-Gi-Oh! GX Terminology#Electrodes]]. Frequent use of electrodes can caused someone to develop a severe heart condition, possibly ending in death. The only known case of this is with Zane (who presumably used the electrodes in several other duels not shown in the anime).
