There are currently a total of 3 Pokémon in the Zigzagoon (Galarian) family. Zigzagoon (Galarian) evolves into Linoone (Galarian) which costs 25 Candy, which then evolves into Obstagoon costing 100 Candy.
There is a very low chance that you can get a shiny Zigzagoon - Galarian, which has the following appearance:
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"Зигзагун всегда беспокойно блуждает по окрестностям и везде суёт свой нос из любопытства. Он интересуется абсолютно всем, что встречает на своём пути."