It's possible you're misremembering the name of the character or episode, or perhaps you're thinking of a different anime series.
Can you give me more details about what you're looking for? For example:
* Who is "Fight Pharaoh 90"? Is it a character name? A monster?
* What kind of fight is it? What are the circumstances?
* What season or arc are you thinking of?
With more information, I might be able to help you find the episode you're looking for.