He played many international matches for Nigeria, and was part of the team that participated in the 1994 FIFA World Cup and 1998 FIFA World Cup and won the 1994 African Nations Cup. He also helped win the Olympic gold medal in 1996, scoring in the Gold Medal game itself against Argentina.

He went on to win the FA Cup with Everton in 1995, scoring two goals in the semi-final against Tottenham Hotspur after ‘substituting himself’ into the match while Paul Rideout was receiving treatment (the manager Joe Royle had only instructed him to warm up in preparation for possibly coming on). He appeared in the final only briefly, late on, again as a substitute but is remembered fondly for his beret-wearing celebrations afterwards.

After leaving Beşiktaş in 1999, his playing career more or less ended. He signed with 1860 Munich, but the contract was cancelled after he failed a medical test. In turn he was rejected by Tranmere Rovers for the same reason. Amokachi trained with French second division side US Créteil, but the deal was hampered by injuries. American MLS team Colorado Rapids signed him in 2002, but seeing he was not fit enough they released him before a single match was played. He went to play in the United Arab Emirates, but was denied again due to his medical condition.

Amokachi managed Nigerian club Nasarawa United and later Enyimba Aba. In April 2007, he quit his role as assistant coach of the Nigeria national team. On 10 April 2008, Amokachi was re-appointed to Nigeria’s national team, the Super Eagles, as assistant coach to Shuaibu Amodu, and then as assistant to Stephen Keshi.

In 2015, Amokachi managed Ifeanyi Ubah, resigning after five weeks in the post. In January 2016, he was named as manager of JS Hercules. 4 February 2020, Amokachi was named as Nigeria’s football ambassador by the President, Major General Muhammadu Buhari (retd).