'A mysterious Pokemon that appears to be a cross between PLUSLE and ARTICUNO. In legends, it visited artists and gave them ideas for their next masterpiece
Physically, Zephy heavily resembles both Articuno and Plusle. Zephy is a bipedal, rabbit-like Pokémon with a cream-colored head, upper torso and belly, and icy blue legs with bluish gray talons for feet. It has red ears, red cheeks and paws, and unlike Plusle, large blue eyes. It also has a small black nose, and fluffy white fur on the top of its head and around its neck. It has a fairly long blue ribbon-like tail, and blue wings with white centers that sprout from its lower back. Zephy is a female-only Pokémon with no male counterpart.
Zephy is often told of in legends, where it gave many artists ideas for their next masterpiece.
Zephy's design concept dates back to Twitch's middle school years. (1) (2).
The only other Pokémon that have the same type combination as Zephy are Frost Rotom and Arctozolt.
Speaking of the Generation VIII Pokémon, Arctozolt, it also shares the Electric/Ice typing, although Arctozolt was released long after Uranium was released. Coincidentally, both are fusions between an Electric-type and an Ice-type, although Zephy seems to be naturally fused, while Arctozolt was fused using science (a combination of the Fossilized Bird and Fossilized Dino).
Twitch uses Zephy as her personal icon.
The fact that Hidden Power is in Zephy's current moveset is possibly a reference to Zephyr, a Plusle with an Ice Type Hidden Power, owned by Twitch (3). Zephy's first incarnation may possibly borrow their concept and type from this Plusle.
Zephyr is based on an old design by Twitch, one of the developers of the game. Appearance-wise, it is inspired by both Articuno and Plusle. (4)
Zephy is a corruption of Zephyr, which was the name Twitch gave to its original incarnation (5) The definition of zephyr is "a light breeze or the west wind".