Here are Malaysian online stores and marketplaces where I found pastel / sheer / tulle dresses (balletcore-style). I’ve linked each entry to a product or category page showing relevant items.

• Nichii — carries pastel and sheer tiered/midi dresses (e.g., lilac sheer tiered midi). (nichii.com)
• Love, Bonito (Malaysia) — several padded/sheer and georgette floor‑length and midi dresses in soft colours. (lovebonito.com)
• PixiesDust (Malaysian indie boutique) — sells “balletcore” / ballet‑aesthetic dresses. (pixiesdust.com)
• Memories Fashion (Malaysia) — pastel / “iced pastel” style dresses. (memoriesfashion.my)
• ZALORA Malaysia — big fashion marketplace with many brands (search “tulle / sheer / pastel” to find balletcore pieces). (zalora.com.my)
• POPLOOK — Malaysian online label with feminine maxi/midi dresses in soft palettes. (aws.poplook.com)
• Shopee Malaysia — large marketplace where independent sellers list pastel tulle / tutu / sheer dresses and overlays. (shopee.com.my)
• Lazada Malaysia — another major marketplace with many mesh / sheer / pastel dress listings. (lazada.com.my)
• H&M Malaysia (online) — carries sheer/tulle dresses (including pastel tones) on its Malaysia site. (www2.hm.com)

Quick tips to find balletcore pastel sheer dresses:

• Search those sites for keywords like: balletcore, tulle, sheer, mesh, organza, georgette, pastel, lilac, blush, baby‑pink.
• Use filters for colour (pastel/pink/lilac), length (midi/maxi), and material (mesh/tulle/organza) to narrow results.
• For smaller/indie or vintage balletcore pieces also try secondhand/preloved sections on Shopee, Carousell or local Facebook Marketplace.

If you want, I can search any one of these stores right now for current pastel sheer dresses in a specific size or colour and show examples.