Unlocking enemy skins

[amuro98]

Under the Achievements screen is a list of skins. You can unlock enemy skins by defeating the indicated number of enemies. This also grants you a bonus multiplier.

Question: How can you find these ships? I've unlocked the first row, and have killed a few thousand of the rest but how can you tell on which stage these are located?

Yes I know the stage selector will display the list of enemies, but for me anyways, after a certain point in the 2nd galaxy the list of enemies is identical no matter what galaxy, planet or stage I choose.

So is there a list of where to find each of the skin ships so you can just go grinding to unlock them?

[Darnavir]

If the list is identical, it means that the same enemie spawn there. "Earlier" enemies don't stop spawning just because you got to a higher area, they keep spawning and more enemies appear on the list of possible spawns. Starting from galaxy 2 onwards, all enemies can spawn. IDK what the spawn ratio is but it seems to be 64 : 16 : 4 : 1 on average for the individual rows with earlier enemies in the row being more common. The first enemy is different, it starts as the main spawn but eventually stops being as common (not the most common enemy in the 1s row). Once you reach hell universe, the spawn function changes and spawn chances of later enemies go up a lot.

In terms of the best farming place, it's always the last area where you kill fast. In other words, don't worry about it and run the areas you would run if skin bonus didn't exist. You will farm the skins anyways. And higher tier enemies mean bigger bonus per kill.