Here are online stores and marketplaces where you can find balletcore / pastel sheer dresses available to buyers in Malaysia (local marketplaces first, then boutiques and international shops that commonly ship to Malaysia):

• Shopee Malaysia — large marketplace with many independent sellers listing “balletcore”, pastel, sheer and coquette-style dresses (search the Shopee Malaysia site or app for “balletcore dress”, “pastel sheer dress”). (Marketplace: Shopee — see Lazada example for the same seller/marketplace model). (Lazada.com.my)
• Lazada Malaysia — major Malaysian marketplace with sellers listing balletcore/coquette items (examples of “balletcore” listings and sheer pastel accessories). (Lazada.com.my)
• ZALORA Malaysia — fashion marketplace that frequently stocks pastel / tulle / sheer dresses and international brands (search ZALORA Malaysia for tulle, chiffon, pastel or “coquette” styles). (Zalora is a primary Malaysian fashion site; see other marketplace examples above.) (Lazada.com.my)
• Room8008 — Malaysia-based boutique that lists a “Balletcore Mini Dress” (example product in pastel/pink). (Room8008.com)
• Etsy — many independent sellers (vintage and handmade) list balletcore / sheer pastel slip and chiffon dresses and ship internationally to Malaysia. Good for vintage or handmade pieces. (Etsy.com)
• Kollyy / ZZKit / other indie aesthetic boutiques — small online boutiques that label items “balletcore” (pastel, ruffles, sheer overlays) and ship internationally or regionally. Example collections and listings are available on Kollyy and ZZKit. (Kollyy.com)
• Boogzel Clothing — online boutique with balletcore-style dresses (ruffles, chiffon, pleats) that advertises international shipping. (boogzelclothing.com)

If you want, I can:

• Search specific listings now (I’ll look up current pastel sheer balletcore dress listings on Shopee, Lazada and Zalora and return direct product examples and prices), or
• Filter by budget, size, or delivery time to Malaysia and return a short list of buyable items.

Which would you prefer?