Zigzagoon to Obstagoon: Level 20, then level 35, at night, as the Galar form

Stages

Zigzagoon starts a line of three stages, from Generation III

1. Zigzagoon#0263normal
2. Zigzagoon to LinooneLevel 20
   Linoone#0264normal
3. Linoone to ObstagoonLevel 35, at night, as the Galar form
   Obstagoon#0862darknormal

How each step works

2 steps in the Zigzagoon line, 1 with a different rule in some games