From Johou Battle:

The Stardust Crusader's "Secret Weapon" in their fight against DIO. At least to them anyways, but Iggy is no fool. He sees most humans as selfish, stupid, and not worth his time. Iggy would much rather roam around and look out for himself, chewing his coffee gum, farting on terrible humans, and living large. But Iggy is not without his heart, he can't help but protect others that care and provide for dogs, and will use his sand Stand, The Fool to punish anyone that threatens dog lovers!

He'll protect those who care for dogs with his life!