Planetary Minimizer

The Planetary Minimizer was a giant machine that Cortex used to shrink Earth to the size of a grapefruit in Crash Bandicoot: The Huge Adventure. It was used in the final battle between Crash and Cortex, in-game, when Crash gets hit by the machine's blast without a mask, he'll shrink down to size and lose a life. It eventually malfunctioned (by destroying the stabilizer gems, the colored gems) and fused Cortex, N. Gin, Tiny, and Dingodile together, creating Mega-Mix. After the "defeat" of Mega-Mix, the Minimizer exploded, with the defused villains escaping in the last moment.

Trivia

 * Actually, shrinking the Earth to a certain radius called Schwarzschild Radius would cause it to become a black hole.