Dusk Diver 2

MISSABLE

Outfits are one of the different types of collectibles in the game that you'll need to find. This time though, it's not just normal clothes, but also includes 3 categories of accessories: Glasses, Head (e.g. Cat Ears, Headphones, etc), and Hip (e.g. Cat or Dog Tails, etc). 

All in all, there are 65 Outfits in total (including accessories), and you'll have to collect all 65 to earn this trophy.

You'll get access to your first Outfit (the Tumaz Mart Uniform) really early on, so you'll be able to get Changing It Up  as early as Chapter 1, but that'll be all for a little while. It's only in Chapter 5, "Back to the Backyard" that you'll truly unlock the Outfits feature in general. This is through the "Yawen's Outfit Designs" Collection Quest. You'll be informed that Yawen, the proprietor of the Little Lady outfit shop, had her Outfit Design Pages stolen and scattered across all of Youshanding.

Much like other collectibles, such as Dragon Vein Shards, you'll have to explore all of the different areas of Youshanding to collect these pages. However, once you turn in those designs, you are not immediately rewarded with the outfits they correspond to; instead, turning them in only makes them available in her shop, and you still have to purchase those designs from her with cash. Unfortunately, they can be a little expensive, especially in the beginning when you don't have much money, so you'll likely have to leave purchasing most until later on when you can afford it. In fact, other than purchasing a couple pieces you really want, it's best to leave this and not buy them until you've found all 61 Designs, so that you can pair this with the The First Million  trophy to make your Platinum much easier and less grindy. (See said trophy for more details.)

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In addition to Yawen's 61 Outfit Designs, there are also a few items that you'll get by doing certain quests. However, it's not confirmed whether all of them count towards this trophy. There is one other category called "Special", and these are the ones in particular that are a question mark. It seems that they are unlikely to be required for the trophy, but they are listed at the bottom of the following list just in case. Either way, you don't need to find those; as long as you do all of the side quests (which you have to for the Platinum anyway), you'll get all of the quest-reward Outfits, possibly even before you finish finding all of the Outfit Pages, so they shouldn't be a concern.

Breakdown: (not counting default outfits)

1. Quest rewards or story-related: 5 Outfits
2. Outfit Design Collectibles sold at the Little Lady Shop: 61 Outfits

The following is the list of all in-game Outfits (excluding DLC):

OUTFITS

1. Everyday Wear (Default)
2. Tumaz Mart Uniform *
3. Party Staff Uniform *
4. Colorful Costume Set 01
5. Colorful Costume Set 02
6. Colorful Costume Set 03
7. Kunlun Military Uniform
8. Evening Dress * (Le Viada Only)

GLASSES

1. Thick Rimmed Glasses A
2. Thick Rimmed Glasses B
3. Thick Rimmed Glasses C
4. Half Rimmed Glasses A
5. Half Rimmed Glasses B
6. Half Rimmed Glasses C
7. Thin Rimmed Glasses A
8. Thin Rimmed Glasses B
9. Thin Rimmed Glasses C
10. Round Glasses A
11. Round Glasses B
12. Round Glasses C
13. Sunglasses A
14. Sunglasses B
15. Sunglasses C

HEAD

1. Cat Ears A
2. Cat Ears B
3. Cat Ears C
4. Dog Ears A
5. Dog Ears B
6. Dog Ears C
7. Rabbit Ears A
8. Rabbit Ears B
9. Rabbit Ears C
10. Devil Horns A
11. Devil Horns B
12. Devil Horns C
13. Bat Wings A
14. Bat Wings B
15. Bat Wings C
16. Sheep Horns A
17. Sheep Horns B
18. Sheep Horns C
19. Bull Horns A
20. Bull Horns B
21. Bull Horns C
22. Trendy Headset A
23. Trendy Headset B
24. Trendy Headset C
25. Trendy Headset D
26. Trendy Headset E
27. Trendy Headset F
28. Trendy Headset G
29. Trendy Headset H
30. Trendy Headset I

HIP

1. Cat Tail A
2. Cat Tail B
3. Cat Tail C
4. Dog Tail A
5. Dog Tail B
6. Dog Tail C
7. Rabbit Tail A
8. Rabbit Tail B
9. Rabbit Tail C
10. Devil Tail A
11. Devil Tail B
12. Devil Tail C

SPECIAL*,**

1. D. ARMS Mk I (Yumo only; Default)
2. D. ARMS Mk II (Yumo only)
3. Long Hair (Le Viada only; Default)
4. Short Hair (Le Viada only)

* Note: Items marked with this (1) are from quest rewards and not a Little Lady Outfit Design.
** Note: It is unconfirmed but highly unlikely that all of these items listed under "Special" count towards the trophy.