The Rumble Fish 2

With the options set to 1 round matches and the difficulty set to Beginner to make this easier. Hazama will appear as your alternative/additional 8th stage opponent if you have finished the first 3 matches/stages with Offensive Art (O.A) finishes. This also includes fighting Greed and cannot use continues before fighting him.

Defeat Hazama and the achievement is yours, and yes, you can continue against him. However, his AI will be scaled to the hardest regardless of difficulty set.