[3] In 1982, Mika moved to Los Angeles with his boyfriend, an African-American man in the US Navy, for nine months before returning to New Zealand.

[1] In 1985, Mika joined Te Ohu Whakaari, a Wellington Maori theatre company which toured nationally and internationally.

During the show, Mika performed New Zealand songs, including "I Have Loved Me A Man" by Allison Durbin.

[10] His solo show Neil Gudsell Uncooked produced by Merata Mita was performed at the 1990 Adelaide Fringe.

[14] Mika performed at the 1992 Hero Party at Princes Wharf in Auckland singing his original song "Lava Lover".

His backdrop was Keith Haring-inspired art with yellow squares with symbols of condoms and safe sex messaging.

[1] In 1998, Mika collaborated with composer Gareth Farr and Mark James Hamilton on the show Ahi Ataahua.

[1] On 1 November 1998, Mika performed on the Stonewall Equality Show 1998 at the Royal Albert Hall,[19] and then toured internationally.

[1] In 2000, Mika created a dance company, Torotoro, with Mark Hamilton and 10 young Māori and Pacific Island performers.

[1] In 2005, Mika performed with a metal band Te Plastic Māori, including at the Montreal Fringe Festival in 2005.

[24] In March 2010, alongside the Auckland Philharmonia Orchestra, Mika performed at the ASB Theatre at Aotea Centre to open the Aroha Festival.

As part of the 2011 Rugby World Cup that happened in New Zealand, Mika put on a free outdoor concert at the Takutai Square, Britomart, in downtown Auckland.

[29] The event happened at the same time as Ireland v Russia and Argentina vs Scotland in the Rugby World Cup.

In 2012, Mika assumed the role as Chair person for the non-profit organisation, "Ngā Aho Whakaari".

[33] Ngā Aho Whakaari is a not-for-profit Incorporated Society that represents Māori who work in the New Zealand screen industry.

Mika did a season of cabaret shows with a live band and special guest including Megan Alatini at one of Auckland's busiest nightclubs "Switch Bar".

[35] At the end of the event, Mika performed his new single "Dress to Express" featuring Zakk d'Larté and Hannah Martin.

[41] Mika Haka opened the event with a branded new song, a remixed version of "Loved Me a Man" featuring Lavina Williams.

[45] Mika also featured in Costa Kerdemelidis' song "Tango on a Tightrope" from Kermelidis' 2017 album The Big Shake.

[4] On 10 September 2019, it was announced that Mika was cast as Ngati Haua entertainer for "Natives Go Wild" show at the Sydney Opera House.

[52][53] On the 28 May 2023, Mika performed the New Zealand national anthem at the historical Lani Daniels vs Alrie Meleisea IBF world heavyweight title fight.

Mika directed, wrote, produced, and played the lead role in the short film GURL about the life of drag queen Carmen Rupe.

[57] In April 2017, Mika X met with a person who had been sexually abused by businessman and arts patron James Wallace.

In February 2021, Mika pleaded guilty on two counts of attempting to pervert the course of justice, and on 30 March 2021, he was sentenced to 11 months of home detention.