Funds is the money you've loaded onto your account. You can do it with a credit card, or with Nintendo Points Cards bought at games stores.
To add funds to your Nintendo eShop account, you must either have a prepaid Nintendo eShop card or a valid credit card. After launching the eShop, swipe to the right or tap the menu button to find the "Add funds" button. Alternatively, if you're looking to buy a specific game, do not have enough in your eShop account, and are paying by credit card, you can browse to the game you want to buy, then tap "Tap here to purchase." When the eShop tells you that you do not have enough to buy it, choose to add funds to your account, select "credit card", then select "needed" to add exactly as much as you need to buy that game. Remember that your eShop account is tied to your 3DS and cannot be used on another system.
you can buy it at gamestop or best buy
A debit card or an ATM card.
Yes, it is possible to transfer funds from a credit card to a bank account using a bank transfer.
A debit card transfer to your bank account is when you move money from your debit card to your bank account. This allows you to access the funds in your bank account using your debit card.
The memory card is an SD card, which you can get at most electronic stores. I think you can also get one from the Nintendo website, but I'm not positive.
No, a Visa debit card is not considered a credit card. It is linked to a checking account and deducts funds directly from the account when used for purchases.
No, you cannot deposit money into a credit card account. Credit cards are used to borrow money from the card issuer, not to deposit funds like a bank account.
No, it is not possible to have a debit card without a bank account. Debit cards are linked to a bank account and are used to access funds deposited in that account.
A prepaid debt card is purchased at a store with specific amount of money on the card. It is used just like a normal debit card. However, if you try to purchase and item and you do not have enough funds on the card, the transaction will be declined. Unlike a regular debit card, which can be linked a savings account to draw out funds to protect an account from over-drafting, there is no account to link to.
To transfer funds from your credit card to your bank account, you can typically do a balance transfer or use a money transfer service. Check with your credit card company for specific options and fees involved in the transfer process.