If the player choses to side with the White Roses, they meet Mako on the boat from Dover to the continent. Mako agrees to take the player to the continent if they can defeat him in a Duel.
A glitch sometimes occurs. If the player's Deck Cost is higher than Mako's, the game will freeze. This is to do with the rule stating that the player cannot Duel someone whose Deck Cost is lower than theirs.
Since Mako Duels at sea, nearly all his monsters get a power boost from the sea terrain. He often fuses his monsters to summon "Aqua Dragon", which turns any square it battles in into water, automatically ensuring it gets its 500 ATK and DEF boost.