Now, a small chimp for breakfast, a mutt for lunch, and a sensible girl for dinner.
~ Siri about Darwin, Spike, and Eliza

Siri is the main antagonist in the 2003 Rugrats and Wild Thornberrys crossover film Rugrats Go Wild, despite her small role.

Siri is a clouded leopard. She first appears when Spike pees on her tail. They have a song battle (Since Eliza can talk to animals, we hear Spike speak for the first time, he is voiced by Bruce Willis) in which Spike wins.

However, he slips out that the Rugrats kids are all alone in woods and Siri goes looking for them.

She appears again chasing them while they're going downhill in the baby carriage when a geyser goes off and washes her away.