Remember, his effect can take out any face-down defense mode monster but it only stops flip effects, such as "Man-Eater Bug". However "Irou" also stops the effects of the other searchers like "Mother Grizzly", "Mystic Tomato" and "Shining Angel" provided that they are in face down defense position.
Activate "DNA Surgery" and call Warrior, while this card is face-up on the field. Then activate "Ready for Intercepting", and flip a strong monster face-down. Attack that card with this card, making it an easy way to get rid of strong monsters.