Game characters

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Across
  1. 3. penguin king
  2. 5. blue bomber
  3. 8. sonic's rival
  4. 10. green stache
  5. 12. right back at ya
  6. 13. evil leader
  7. 14. flying fox
  8. 15. famous plumber
Down
  1. 1. earthbound hero
  2. 2. x's friend
  3. 4. dr. robotnik
  4. 5. star knight
  5. 6. speedy animal
  6. 7. robot master maker
  7. 9. green legend
  8. 11. king koopa