Raksha (BW)

''Raksha is Megatron's greatest enemy in the Beast Wars Era. Probably the same individual as longtime Transformers fan Raksha''

Beast Wars: Visitations script reading
The time-traveling Antagony described herself as Megatron's doom, his destruction, and his worst enemy.

Megatron assumed this meant she was Raksha (his worst enemy.) Antagony corrected this misunderstanding.

It is currently believed, based on various metatextual elements from the Visitations script, that the Raksha Megatron refers to is the well-known Transformers fan, and not a hetherfore-unseen Predacon rival of Megatron.

''The name Raksha has several meanings in mythology and literature- notably as a female wolf in Rudyard Kipling's The Jungle Book. Thus, the Raksha Megatron refers to may be a Transformer who was named as a homage to the fan Raksha. A similar homage was written for an episode of the Beast Wars television series, but she declined the honor.''