After getting a good lead, allow the CPU to score. Then, take the puck behind your goal. The CPU players will not be able to get it. Simply allow the clock to run out for an easy win.
When leading the score with only a short amount of time, try skating around in circles in your own end. Your opponent should not be able to get the puck before the clock runs out.
Press Up(2), Down(2), Left, Right, Left, Right, B, A, B, A, Start at the Ultra Games screen.
Hint: Easy Goal
Skate to the south wall after getting the puck, then move directly to the blue line. Press the D-pad diagonally towards the goal while simultaneously shooting the puck.