Why did Dr Robotnik become Eggman?

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Tags

1. #referred
2. #sonic
3. #known
4. #archenemy
5. #becoming
6. #hedgehog
7. #character
8. #robotnik
9. #switch
10. #first
11. #eggman
12. #explains
13. #developed
14. #originally
15. #called
16. #before
17. #prompted
18. #eventually
19. #japan