Pikachu is the best (it really is) random clues and word

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Across
  1. 4. Rock snake
  2. 6. Man's best friend
  3. 8. 2nd letter of the alphabet
  4. 9. Likes to chase mice
  5. 11. Large marsupial
  6. 14. Poké Ball user
  7. 16. Flying mammal
  8. 17. Electric mouse
  9. 19. Legendary fire bird
  10. 21. Healing center
Down
  1. 1. Has a trunk
  2. 2. Device to catch Pokémon
  3. 3. Ash's bird companion
  4. 5. Electric evolution of Eevee
  5. 7. Water-type starter
  6. 10. Ice bird legendary
  7. 12. Fire evolution of Eevee
  8. 13. Plant dinosaur
  9. 15. bug
  10. 18. Evolves from Charmander
  11. 20. Psychic-type cat