Fight against Alphabet character
Highlight Akira on the character selection screen and press [Start]. Then, highlight Lau and press [Start]. Finally, highlight Pai, hold [Start], and press [X].
Fight as Alphabet character
Highlight Akira on the character selection screen and press [Start]. Then, highlight Lion and press [Start]. Then, highlight Pai and press [Start]. Then select any character and press [A].
Fight as Silver Dural
Press [Start] + [Y] + [A] at the character selection screen in training mode.
Fight as Gold Dural
Press [Start] + [X] + [A] at the character selection screen in training mode.
Fight as Dural in training mode
Choose training mode, then select any character for yourself and the CPU. Then, highlight the Train Station (Sarah's) stage and press [B] to return to the character selection screen. The CPU fighter will now be Dural. Press [B] again to select Dural as your fighter.
Fight as Dural in any mode
Press [Down], [Up], [Right], [Left], [Start] at the character selection screen. Highlight Dural and press [A] for Silver Dural or [Start] + [A] for the Gold version.