This video shows all Zelda outfits (including amiibo exclusive costumes) and their locations in The Legend of Zelda: Echoes of Heroes for Nintendo Switch.

00:00 Quick showcase

How to get all costumes:
02:47 Cat Clothes (Questioning the Local Cats side quest)
05:36 Customary Attire (From the Heart side quest, unlocked after clearing Impa's Gift side quest)
15:29 Dancing Outfit (clear the last stage of Mango Rush minigame)
17:49 Disguise (during the prologue)
18:52 Green Tunic (beat all 15 challenges in Slumber Dojo)
19:34 Royal Travel Attire (complete Hyrule Castle Dungeon during the main story)
20:25 Silk Pajamas (Dohna's Challenge side quest)
22:48 Stamp Suit (collect all 25 Stamps)
24:56 Red Tunic, Blue Attire and Black Cat Clothes (scan any Link, Zelda and Ganon amiibo figure)