Jarvis, the Jar Collector is a portrait ghost found in Area Four in the Ceramics Studio in the game Luigi's Mansion. Jarvis is an optional portrait ghost, but if you capture him you will receive a silver diamond and two gold bars.
When Luigi finds Jarvis, he will be challenge to a game of Whack-A-Mole. In this game, Jarvis will randomly pop out the jars scattered around the room. Luigi must have sucked up an Ice Elemental Ghost to win this battle. Luigi must blast Jarvis seven times with ice from the Poltergust 3000 in order to win. After this, Jarvis will be vulnerable and can be captured.