Taking the top spot in the round-up is superhero T'Challa – also known as Black Panther – with a $535 billion (£400bn) fortune.

T'Challa (played by Chadwick Boseman in the Marvel movies) is the king of Wakanda, a technologically advanced nation rich in the fictional metal vibranium. The philanthropic ruler invested in scientific research, education, and infrastructure to enrich the nation of Wakanda and combat global injustice.

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Who makes the top 20 richest fictional characters list?