I work for a shipping company that routinely deals with Nintendo promotional goods. I did manage to get a glimpse of the starter evolutions on some inventory items.

Sprigatito evo 1: Kinda reminds me of Luxio but sassy. Its green colors are swapped around.
Sprigatito evo 3: Quadriped with a masquerade mask with shadows added to some of its hairlines. Think Zapdos wings. Definitely also a dark type.

Fuecoco evo 1: Looks Croconawish and has a visor like skull covering its face. Like if Cubone could flip his skull upwards.
Fuecoco evo 2: A fat croc with legs so stubby it passes off as a Wyrm. The skull is more rounded like the bell of a pepper. Is shown tired/sleeping on promotional material. Undoubtedly a ghost pepper.

Quaxly evo 1: a taller thinner bird that looks smug as hell and his hair is longer. The internet will definitely make porn of this fucker.
Quaxly evo 2: Has a conquistador style hat and uses some kinda stick like a rapier.

Thats it right now. Might stick around for a bit to answer questions.