Yes, you can buy Nintendo e-gift cards online through the NOSH app.
Go to Buy Gift Cards, select the country and Nintendo as the gift card brand, then enter the amount and quantity you want to purchase.
Pay using your NOSH Naira Wallet. If you're in Ghana, convert your Cedis to Naira for free in the app, then pay from your Naira Wallet.
You will receive your e-code after a successful purchase.