Upon taking down a Barroth EX in the Experimenting Arena of the lab in Dovan Volcano, you approach the Felyne passed out in the middle of the arena. You were informed about this strange cat by a group of caged Felynes on your way here beforehand. You saved him from the Barroth. He stands up, dusts himself off, and begins to speak in his unique, nerdy voice.

"You only had a 14.9% chance of saving me! I'm Number Four, or, Spex. Gracious, I barely escaped being reduced to monster nutriment..."