Question: The Nickelodeon Australian Kids' Choice Awards 2008 were hosted by what American professional wrestler who started his professional wrestling career in 1999 with Ultimate Pro Wrestling?

Context paragraphs:
Mio Shirai: Mio Shirai (紫雷 美央 , Shirai Mio , born February 14, 1988) is a Japanese former professional wrestler and current professional wrestling referee.  She started her career in March 2007, working alongside her sister Io Shirai on the Japanese independent circuit for promotions such as Ice Ribbon, JWP Joshi Puroresu and Pro Wrestling Wave.  In June 2010, the Shirais came together with fellow freelancer Kana to form the Triple Tails stable as part of which they began working most notably for Smash.  After Io left the stable the following year, Mio and Kana continued working together as the tag team Triple Tails.S.  Shirai remained a freelancer until January 2014, when she signed a four-way contract with Ice Ribbon, Oz Academy, Pro Wrestling Wave and Union Pro Wrestling.  She retired from professional wrestling due to neck injuries in September 2015 at the age of 27, after which she started working as a referee.

Black Buffalo (wrestler): Keisuke Yamada (山田 圭介 , Yamada Keisuke , born July 6, 1974) is a Japanese professional wrestler, better known by the ring name Black Buffalo (ブラックバファロー , Burakku Bafarō ) .  Originally starting his career in International Wrestling Association of Japan, where he worked under his real name, Yamada found a new home promotion in 1999 in Osaka Pro Wrestling, where he began wrestling under a mask and the ring name Black Buffalo.  For most of his career in Osaka Pro, Yamada has portrayed a villainous character, having been a part of every major villainous alliance in the history of the promotion.  During his first years in the promotion, Buffalo went on to become a four-time Tag Team Champion.  In February 2008, Buffalo was forced to unmask and reveal his true identity, after losing a match, and afterwards began teaming with the man, who unmasked him, Tigers Mask, with two becoming two-time Osaka Pro Wrestling Tag Team Champions together.  Finally, in March 2012, Buffalo managed to win Osaka Pro's top title, the Osaka Pro Wrestling Championship.  Backstage, Yamada served as the vice president of Osaka Pro Wrestling.  Yamada left Osaka Pro Wrestling after the promotion went through a corporate restructuring in April 2014, shortening his ring name to Buffalo (バッファロー , Baffarō ) .

Bam Bam (wrestler): Jesús Guillermo Anaya Cortés is a Mexican luchador, or professional wrestler, best known under the ring name "Bam Bam", a Mini-Estrella, or "Mini" wrestler.  Anaya made his professional wrestling debut in 2002 and has worked mainly for the Mexican professional wrestling promotion Consejo Mundial de Lucha Libre (CMLL), where he is a former CMLL World Mini-Estrella Champion.  He is the son of professional wrestler Popitekus, Jr. who also helped train him for his pro wrestling career.

Gregg Groothuis: Gregg Groothuis (born May 1, 1970) is an American professional wrestler, known by his stage name Jack Bull, who competed in North American independent promotions including Impact Zone Wrestling, the National Wrestling Alliance and Ultimate Pro Wrestling as well as Japanese promotions HUSTLE, New Japan Pro Wrestling and Pro Wrestling ZERO1.

Tony Jones (wrestler): Anthony "Tony" Jones (born April 6, 1971) is a retired American professional wrestler who competed in North American independent promotions, specifically California-based All-Pro Wrestling, Ultimate Pro Wrestling and Xtreme Pro Wrestling.

John Cena: John Felix Anthony Cena ( ; born April 23, 1977) is an American professional wrestler, rapper, actor, and reality television show host.  He is currently signed to WWE, where he is a free agent, appearing for both the Raw and SmackDown brands.  Cena started his professional wrestling career in 1999 with Ultimate Pro Wrestling (UPW) and won the UPW Heavyweight Championship the following year.  Cena signed a developmental contract with the World Wrestling Federation (WWF, later renamed to World Wrestling Entertainment, or simply WWE) in 2001, debuting on the WWE main roster in 2002.

Taichi Ishikari: Taichiro Maki (牧 太一郎 , Maki Taichiro ) is a Japanese professional wrestler, better known by his ring name Taichi Ishikari (石狩太一 , Ishikari Taichi ) or simply Taichi (タイチ , Taichi ) .  He is signed to New Japan Pro-Wrestling (NJPW), where he is a former two-time IWGP Junior Heavyweight Tag Team Champion.  Throughout his career he has competed in various promotions including All Japan Pro Wrestling, Consejo Mundial de Lucha Libre, Hustle, Pro Wrestling Noah and Ultimate Pro Wrestling.

Tom Howard (wrestler): Tom Howard (born Thomas Merrett Howard December 26, 1969 in Salt Lake City, Utah) is an American professional wrestler, and actor.  He is best known for his Green Beret role in K-1 and Pro Wrestling ZERO1-MAX in Japan.  As a veteran competitor and instructor, Howard has worked for World Wrestling Federation (wrestler-instructor), World Championship Wrestling (wrestler), Pro Wrestling Zero-One (wrestler-instructor), Universal Fighting-Arts Organization (wrestler-instructor), K-1 (fighter – MMA, kickboxing), Cage Rage (fighter), IFL (fighter), All Japan Pro Wrestling (wrestler), Pro Wrestling Noah (wrestler), Inoki Genome Federation (wrestler), HUSTLE (wrestler), Asistencia Asesoria y Administracion (wrestler) and Ultimate Pro Wrestling (wrestler-instructor).

Nickelodeon Australian Kids' Choice Awards 2008: The 6th annual Nickelodeon Australian Kids' Choice Awards were held on 11 October 2008 at the Hisense Arena in Melbourne.  John Cena has been picked to host the Nickelodeon Kids Choice Awards alongside Natalie Bassingthwaighte.

Bambi Hall: Samantha Hall (born July 14, 1992) better known by her ring name Bambi Hall is a Canadian female professional wrestler who debuted on June 18, 2011, and for All Star Wrestling (ASW), in June 2012 currently working for All Star Wrestling, and is the current Women's Champion.  Hall also works for other Canadian independent promotions including Canadian National Wrestling Alliance (CNWA), Big West Wrestling (BWW), Beauty Slammers Wrestling (BSW), Canadian Wrestling's Elite (CWE), Wise Pro Wrestling (WPW), Elite Canadian Championship Wrestling (ECCW), Real Canadian Wrestling (RCW), Vancouver Island Pro Wrestling (VIPW), Pure Wrestling Association (PWA), Monster Pro Wrestling (MPW), Trash Wrestling, Pure Power Wrestling (PPW), Tony Condello Promotions (TCP), Gold Dragon Wrestling (GDW), and Midget Wrestling Warrirors (MWW), as well Hall has also competed in the United States in SHIMMER Women Athletes, West Coast Wrestling Connection (WCWC), and Vendetta Pro Wrestling (VPW), in Las Vegas, Nevada.

Supporting paragraphs: Nickelodeon Australian Kids' Choice Awards 2008 John Cena
Answer: John Felix Anthony Cena