After selecting character at Character select screen in Ladder Mode, hold down back button while selecting difficulty. The game will default to include Goro, rather than Kintaro in the boss fight.
Always fight Goro in Ladder Mode
Hold down Back button when selecting difficulty mode
Take A Spin Fatality
Press Forward(2), Down(2), A when in sweeping distance.
Up The Middle Fatality
Press Back, Forward, Down, Forward, X when in sweeping distance.
Brain Freeze Fatality
Press Down(2), Back, Down, X when in jumping distance.
Kold Fusion Fatality
Press Down, Back, Down, Forward, Y when in jumping distance.
Press Down, Back, Forward R2 (Jump)