Shadow 1: The odd ball-like thing reminds me of Mantine, but I don't wanna jump to conclusions, because I remember saying in the topic where Manene, Bonsly and Manyula's shadows were posted that Manene's shadow was a Misdreavus evo/pre-evo because we saw Misdreavus in the pictures we had of the 8th movie. It'd be interesting if it was related to Mantine, though it reminded me of Dustox.
Shadow 2: The split-tailed creature reminds me of a pokemon that isn't related to others. But I also said that about manyula's shadow.
Shadow 3: Glad I wasn't the only one to think this was an Absol pre-evo. Looks Murkrow-ish, and the translation about it makes me doubt it's Farfetch'd a bit, even though I think it's got the chance.
Manafi: I'll call it Manafi, even though its English name may be manaphy. After all, I prefer Manafi. If I put all the 4th gen art together (only the ones from when they were revealed), I can admit it's the cutest of them all. It may be the 4th small legendary, like Mew, Celebi and Jirachi. It's got potential, though I think one of the other 3 may be stronger.
Edit: If Woopert is correct, can someone check to see which Pokemon's japanese names are related the most, just in case it's related to one?