Mad Dog

Inukai/Mad Dog (犬飼) was Zane's opponent in the Underground Duel. In the Japanese version, "Mad Dog" is actually his nickname, and translated literally, his given name means "dog world." In the English version, his voice is an imitation/parody of Mike Tyson.

Dueling Cards
Mad Dog uses an Slime-themed Deck:

Monster Cards

 * Acid Slime
 * Clone Slime
 * Draw Slime
 * Multiple Slime

Spell Cards

 * Contingency Fee
 * Card Destruction
 * Pot of Greed
 * Slime Base
 * Jam Breeding Machine

Trap Cards

 * Last Machine Acid Virus
 * DNA Surgery
 * Jammer Slime
 * Despised Reality
 * Slime Ball
 * Trap Trip
 * Jam Defender