Stoatpaw is on a borderpatrol along the border that separates ThunderClan territory from ShadowClan territory with Ratscar. They encounter a ThunderClan patrol, and Stoatpaw informs them of ThunderClan scent on their territory. Lionblaze crosses the border and finds the scent marker, attempting to cover it up with his own scent as he observes it carefully. In desperation to prove that he can get hurt, and not be ruled by his destiny, Lionblaze openly shows hostility to the ShadowClan patrol, looking for a fight, and Ratscar tells Stoatpaw to attack Lionblaze if he wants a fight. Lionblaze refuses to fight with a young apprentice, and fights Ratscar instead. He lets himself be defeated by the warrior.
Along with Ratscar and Tigerheart, he is one of the cats to accompany Blackstar when he comes to ThunderClan territory to speak with Firestar due to the incident with Lionblaze earlier.
During the battle with the Dark Forest, Stoatpaw is one of the messengers, asking for reinforcements at the ThunderClan camp since Blackstar lost a life and they were outnumbered and exhasuted.