Why is it called metroidvania?

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Tags

1. #there
2. #terms
3. #warrant
4. #roguelike
5. #prime
6. #style
7. #example
8. #metroid
9. #particular
10. #named
11. #because
12. #having
13. #enough
14. #generic
15. #popularized
16. #metroidvania
17. #games
18. #genres