How to repeat colossi fights in Shadow of the Colossus? Shadow of the Colossus Guide, walkthrough

Colossi fights can be repeated in two ways - after completing the main storyline during Time Attack challenges (crouch before a sculpture of the chosen colossus) or during reminiscence mode. Time Attacks were described in a separate chapter...

Stand over Colossus remains and crouch to get into Reminiscence Mode

Reminiscence Mode is activated when you revisit an area and encounter the remains of a defeated boss. You can repeat the fight by crouching (R2). You can repeat the fight in order to unlock additional items and trophies, as the player maintains his current statistics, resulting in an easier fight if the scene was revisited after attaining additional power-ups. Defeating the boss in this mode yields a trophy.