Single post in A Guide to Arceus Rank || From Beginner to Arceus

This stage is pretty simple, and where everyone should start. Hatch all the eggs you can. Adopt from the lab, claiming any eggs without a species name when you hover over them. Adopt from the shelter, both eggs and hatched pokemon, but focus on eggs at first to work on expanding that egg-dex. Make sure you're clicking through people's parties, because most people will click back, and that will hatch your eggs more quickly.

Also a pretty straight-forward stage. This is where the Quality of Life (QoL) userscript will really start helping out, by highlighting pokemon/eggs you haven't dexed yet. All those eggs you've hatched? Work on evolving the pokemon. Adopt hatched pokemon from the shelter and breed for eggs you've had trouble finding. Look for Pokefarm Variants and Exclusives in the Shelter. Keep doing scour missions to get evolution items, form-change items, and maybe some summon items and mega stones.

A Regional Forme egg can be obtained by breeding a male of the Original Forme with a female pokemon from the region of the desired Forme (not a Regional Forme female) The exceptions are:

Here's where things start slowing down and require more planning. Build up your farm. Scour for summon items. Refresh the Shelter frequently for any eggs/pokemon you're still missing. Maybe do a small shiny hunt while you work on unlocking Summon items. This is a good time to level up your wishforge badges and participate in weekly tournaments (you'll need the tokens). Don't forget to participate in Contests and Fabulous Friday. It's a good way to get some extra GP! This stage can last until or after you hit Champion Rank. After this, dexing takes some targeted effort, so don't feel like you have to rush through.