Like most porcupines, Spike is small and portly with an array of long brown quills on his back. His eyes are colored a deep black.
Despite his fearsome exterior, Spike is friendly and only willing to use his quills if threatened. He appears genuinely upset when he hurts Simba, though he is quick to point out that he only used his weapons in self-defense.
Spike meets Timon and Pumbaa in an elephants' graveyard, where he assures the duo that nothing here will harm them. He then introduces himself to the two and explains his strange hankering for elephant bones. When he offers a bone to Timon and Pumbaa, the friends politely decline, and Spike offers to show them where they can dig up bugs. In their haste to follow Spike, Timon and Pumbaa trip over each other and roll down a steep embankment. Spike moves to follow them, but Simba mistakes the porcupine for an enemy who has knocked Timon and Pumbaa down the hill himself.
The cub roars in defense of his friends, and Spike shoots the young lion with quills. In horror, Timon and Pumbaa run to their friend's side, and Spike wails that he hadn't known Simba was their friend and that he was only defending himself. Timon and Pumbaa are quick to forgive him, but they leave right away with an injured Simba, seeking medical help from Grandmother Elephant.