Action Details
Requirements and how-to articles for Nintendo's action:

In order to create titles for Nintendo Hardware, you must first register as a Nintendo Developer. You can register either as an organisation or an individual.

You need this to get it done:

Organisational/Legal Name
If you represent a corporate entity, enter the legal company name as registered, including any suffix such as "llc" or "Inc". If you are an individual, enter your full legal name as recorded on your government-issued ID.
Doing Business As Name
This is the name you (or your company) normally go by when doing business, if different from the full legal name. Nintendo will use it when displaying your name to customers.
The business address for yourself/your organisation.
Existing Agreement
Indicate whether you/your organisation already have an existing publishing agreement with Nintendo.
Your first and last name.
Job Title (optional)
Your job title.
Nickname (optional)
Enter a nickname for use in the Nintendo Developer Portal forums.
Nintendo Developer ID
This is your Nintendo Developer ID. Choose an easy-to-remember name that is 5 to 32 characters long.
Email Address
Enter a valid email address that is less than 75 characters.
Legal Agreement Authorisation
Indicate whether you are authorised to enter into legal agreements on behalf of your company. If you are not, please enter a Company Officer or other authorised individual in the Legal Agreement User section.
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How-To Articles
A list of useful links for you:

Nintendo Developer Portal - FAQ
FAQ regarding developing games for Nintendo platforms. There is also a link to the Developer registration form at the bottom of the page.
Nintendo Developer Portal - The Process
A quick overview of the steps to get your game released on a Nintendo console.
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