Hatchimals Pixies
First released in April 2019, Hatchimals Pixies are the first in a series of Pixie-themed surprise toys by Spin Master. At their premiere release, 8 different pixies were available to collect, each coming with 3 mystery accessories, a Pixie bed, and display stand. Each egg appears to currently retail for $12 to $15.
Hatchimals Pixies Royal Snow Ball
Series 2, Hatchimals Pixies Royal Snow Ball, was released in October 2019, with 8 more dolls to collect. Some characters from series 1 came to series 2, but other characters are first seen here. Each toy comes with 3 royal accessories, a spinning dance floor display, and piece of dance floor decor. As of now, this toy retails for around $23, but it originally retailed for about $10.
Mega Secret Surprise Exclusive Pixie
While 8 new pixies are available via these toys, an exclusive doll is also advertised as being in the Mega Secret Surprise Exclusive. This pixie comes with 6 wearable accessories, in addition to other surprises in the pack. The entire surprise egg originally retailed for about $40.
Hatchimals Pixies Vacay Style
Hatchimals Pixies Vacay Style was released in April 2020, according to Amazon review times. This toy brought 10 new toys to collect, with 5 found in pink suitcases and the other 5 found in purple ones. In this series, each doll comes with 3 mystery accessories and a display stand, but there's also the chance of getting an exclusive Hatchimal as a stowaway. These toys can be found in packs of one or two, and each individual pack retails for around $10.
Hatchimals Pixies Rainbow Unicorn Party
In late summer/early fall 2019, the Hatchimals Pixies Rainbow Unicorn Party Playset was released, bringing with it 2 exclusive pixies. Both pixies have flocked hair and detailing, and come with 3 mystery accessories and a stand. Despite having only 2 new pixies in this release, they were not sold separately and instead retail for around $16 a pop.
Hatchimals Pixies Cosmic Candy
Released in summer/fall 2020, Hatchimals Pixies Cosmic Candy was a candy-themed series of surprise pixies. 8 new pixies were revealed, with one Hatchimal, 2 accessories, a display stand and stand backdrop. Like the other Cosmic Candy releases, I think this was a limited edition series, and so prices for one of these toys vary greatly.
Galaxy Gwen
Around the same time, a playset was released in the Cosmic Candy series, featuring another exclusive pixie. Galaxy Gwen comes with 14 accessories and an exclusive Hatchimal. This playset is still listed on Amazon, and is currently being sold for $36.
Hatchimals Pixies Babysitters
Hatchimals Pixies Babysitters were released in summer 2020, with 6 new pixies to collect. Each doll comes with a companion Hatchimal, a locket, a crib, 2 mystery accessories, and a display stand with backdrop. At the moment these sets retail for about $16.
Hatchimals Pixies Wilder Wings
Hatchimals Pixies Wilder Wings was released circa December 2020 with 6 brightly-winged pixies to collect. Each doll comes with its own pair of large wings, in addition to 2 accessories and a display egg. While they're marketed as a surprise toy, it's possible to pick the pixie you want by looking at the wing patterns in-package. Each toy retails from $16 to $20.
Note: I know the Pixie Riders exist, I just plan to cover them another day.
Hatchimals Pixies Mermaids
Hatchimals Pixies Mermaids were released in spring 2021, with 4 mermaid pixies to collect. This was a smaller series than usual, with two pixies typically sold in a two-pack. Each pixie/mermaid comes with a real ponytail, 3 accessories, and 2 mermaid beds. These two-packs appear to retail for around $30.
Hatchimals Mini Pixies
Aside the normal Pixies, series of mini Hatchimal Pixies were also released through the years. The first series was released in fall 2020, with 20 to collect overall. Usually these were sold in two-packs, and retailed for around $13.
Hatchimals Mini Pixies Fashion Show
The next sets of mini pixies came in fall 2020, with the Hatchimals Mini Pixies Fashion Show sets. Each eight-pack came in either pink or purple, with each color yielding one of two sets of eight pixies, for 16 mini pixies overall to collect. It looks like these sets last sold for anywhere upwards of $45.
Hatchimals Mini Pixies Glitter Angels
The last released series of mini pixies, Hatchimals Mini Pixies Glitter Angels, came out towards the end of 2020, with 12 new glittery pixies to collect. These toys typically came in two-packs, and were sold for anywhere from $6 to $27.