Spike: Play some Crash Bandicoot.
Crash Bandicoot is a video game series that stars an anthropomorphic bandicoot of the same name who usually has to collect 25 purple crystals in order to stop the plans of his creator and nemesis Dr. Neo Cortex. Crash also collects such items as gems, relics, and wumpa fruits. The series started in 1996 on the PlayStation (which Crash is often considered to be the mascot for).
Given the time in which the episode takes place, and the fact that Spike owns an XBox, the game is almost certainly "Crash Bandicoot: The Wrath of Cortex". Also, the box on the TV appears to be for "Wrath of Cortex" and the music that is heard is consistent with that idea.