Rundown of all the hints so far (the OP misses a few things):
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https://twitter.com/ohast_jp/status/1268436787782840320 - Clip that I think is from the segment with Incineroar, though Incineroar's hint is the only one not explicitly posted to their Twitter. Explicitly states their first two hints as Eevee and Mew. Eevee was Hint 1 from them, Mew was Hint 2, and Incineroar was Hint 3.
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https://twitter.com/ohast_jp/status/1268744241708068864 - Oha Suta Hint 4: Venusaur
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https://twitter.com/poke_times/status/1265160767000764416?s=21 - Poke Times Hint 1: Wailord. Confirmed in a reply post.
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https://twitter.com/poke_times/status/1265523290250100736 - Poke Time Hint 2: .....Ditto? You can see it clearly by the end of the short clip (hint: twig is its mouth) but that creates a fun discrepancy with Eevee.
- Pokemon Card Channel Hint: Duraludon
- Pokerun TV Hint: Lucario
- The ninth hint will air on Pokenchi on Sunday night Japan time. I would expect Galar Slowbro given the Darkness Ablaze stuff.
So that gives us this list so far....
Grass: Venusaur
Fire: Incineroar
Water: Wailord
Lightning: Jolteon or Ditto
Psychic: Mew
Fighting: Lucario
Darkness: Galarian Slowbro, probably
Metal: Duraludon
Colorless: Eevee or Ditto