Question: What is the real name of the final boss seen in The Punisher: The Ultimate Payback?

<P0-S0> Jigsaw (Billy Russo) is a fictional character, a supervillain appearing in American comic books published by Marvel Comics. <P0-S1>  Created by Len Wein and Ross Andru, the character made his first appearance in "The Amazing Spider-Man" #162 (November 1976), and is the archenemy of the Punisher. <SEP> <P1-S0> The Go-Katz are a British psychobilly band formed in Loughborough, Leicestershire in 1986. <P1-S1>  The original members were Howard Raucous (real name Howard Piperides) on vocals, Beaker (real name Giles Brett) on guitar, Andy Young (guitar), Moff (real name Mark Moffat) on Double Bass, and Wolf (real name John Basford) on drums. <P1-S2>  The band members have formerly made up Loughborough bands The Exorcists and The Go-Go Dakotas. <SEP> <P2-S0>  He is also a professional skydiving coach and instructor, currently holding seven world records in the sport. <P2-S1>  His bass playing style is characterized by a very fast precise pick attack, and fast runs. <P2-S2>  Unusually for a bass guitarist, he sometimes utilizes an overhand tapping technique more common to six string players. <P2-S3>  He can be seen in the independent film Six Sex Scenes and a Murder, in the role of the bounty hunter. <P2-S4>  A prolific session player, he appears both credited and uncreditied on many releases throughout the 1980s and early 1990s under both his real and stage name. <P2-S5>  He was also one of the first bass guitarists in the world to use Trace Elliot amplification. <P2-S6>  For a short time in the early 1980s, he was also a member of British R&B band The Mosquitos, with guitarist Steve Walwyn of Dr. Feelgood and Eddie and the Hot Rods, and can be seen on the cover of The Mosquitos only single "Somethin' Outta Nothin'". <P2-S7> Brian Helicopter is the stage name of Gareth Holder (born 27 June 1958, Leamington Spa), an English musician, based in the United States. <P2-S8>  He was one of the first bassists in the nascent UK punk scene to adopt the Rickenbacker bass guitar which he still uses to this day. <P2-S9>  He currently resides in California, where he plays bass for the San Francisco Bay Area band Ghosthookers. <P2-S10>  Ghosthookers released a record in 2008 which features Brian Helicopter on bass under his real name. <P2-S11>  He is also a vegetarian. <P2-S12>  He continues to play professionally, reverting between his real name and his stage name as the fancy takes him. <P2-S13>  He is best known for playing bass guitar for the UK punk rock band The Shapes. <P2-S14>  He can be seen in an episode of MythBusters aired on the Discovery Channel taking presenter Kari Byron skydiving whilst testing the falling airplane blue ice myth. <SEP> <P3-S0> The Punisher: The Ultimate Payback! <P3-S1>  released in 1991 by Acclaim Entertainment is the Game Boy version of the 1990 NES console game The Punisher about the Marvel comics vigilante Frank Castle, also known as the Punisher. <P3-S2>  It contains several changes from the original. <P3-S3>  It features cameo appearances of Spider-Man in the first level rescuing hostages and the final boss was switched from Kingpin to Jigsaw.