Polnareff tried to deal with his death or eventual death situation comically to distract himself from the hopelessness of it all but Iggy wouldn't have it even at the cost of his own life. The brave dog figured that his partner's in a more stable condition than he currently is and would've been more suitable to tell the others about Vanilla Ice's power and to relay the news of Avdol's death so he gave his all by saving Polnareff with the Fool's last breath.
Damn dog made me cry ;~;