all 1-3 should be soloable. Prodigies Nation just messed up. Cloyster will be tricky, but it is absolutely possible. Tentacruel will be similar, but add some psychics and you're good.
If pokebattler worked I'd check my pokémon to confirm.
My guesses:
you can smack away porygon with psychics, dark or fighting types.
same for Ninetales, but with Golem, Vapes and Ttars. Solar Beam will be interesting, but is easily dodged.
Scyther, some rock, electric, fire. I see no problems at all.
Omastar is double weak to grass and Machamp and Electrics fill the line up.