Pack Rat is a Elusive Zombie Foe in Plants vs. Zombies: Battle for Neighborville who resembles a Foot Soldier wearing the "Corporal Shootypants" Costume with the "Rubbish Ranger" Set. He can be encountered in the sewers of the Town Center, or at the museum, where defeating him rewards the player with the ELUSIVE FOE: Pack Rat medal.
He is named after the Pack rat, small rodents who build large complex nests using various available materials, due to the large rat sitting atop his head.
His name may also be a reference to the Rat Pack, a group of entertainers centered around the Las Vegas casino scene whose most famous members consist of, among others, Frank Sinatra, Dean Martin, Sammy Davis Jr., Peter Lawford, and Joey Bishop.
Finding Pack Rat varies between people's games, he can be located in the town center's sewers behind the movie theater but sometimes won't appear for some people. If Pack Rat isn't in his sewers start a skirmish around the museum to try to bring him out, keep fighting enemies until the map spawns him in and if he doesn't spawn reload the map and try again.
If Pack Rat spawns in the sewers and you have the ancient piping gig, consider to pay 75 tacos for an easy vanquish.