Pchal Cryptic Crossword (Related to stream, not all Pokemon names)

12345678910111213
Across
  1. 3. Some say he may carry the world on his shoulders? (6)
  2. 6. Couple cross over street - that's guaranteed! (6)
  3. 7. Look in open Guinness - it's black, white and cold! (7)
  4. 9. Walkover, one not featuring a game of strategy? (8,5)
  5. 11. Forest sprite takes back semi-sweet plant (9)
  6. 13. Ate and drank cocktail with AI boss? (6,4)
Down
  1. 1. Mathematician says "See you later!", drinks alcohol (10)
  2. 2. Wire home, important Pokemon has arrived! (3,2)
  3. 4. Swinger is in tune after first of March (6)
  4. 5. North of Munich upholds initialisation of trade deal (4)
  5. 8. Born again hero (4)
  6. 10. Towels thrown after this happens? (2,4)
  7. 12. Streamer of the month (3)