Diablo was the name given to a Tyrant like creature that appeared as a Boss in Resident Evil: Horror Unleashed, the creature unlike other Tyrants, this Tyrant was able to fly due to two wings that had sprouted from its back after its legs had fallen off during transformation from human, to Tyrant. It was later killed by Julia Hayes, a police officer. This Tyrant was later identified by a R.E.X. soldier as a failure.

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