You need a paid membership to Nintendo Switch Online to play

Nintendo Switch Online membership: what you need to know

Nintendo Switch buying guide: What you need to know - Android Authority

Nintendo Switch Online - Nintendo - Official Site

Nintendo Switch Online: GoldenEye 007 Joins N64 Retro Library - CNET

How to play Game Boy Advance games on the Nintendo Switch

How to get Nintendo Switch Online without a credit card

Nintendo Switch Online + Expansion Pack 12-month Individual Membership – [Digital Code] : Everything Else

You need a paid membership to Nintendo Switch Online to play course world in Super Mario Maker 2. Pretty sure you could access course world at no extra cost in the original

Nintendo Switch Online: Is the new paid subscription service actually worth it?

2020 How to Set Up a Nintendo Switch Online Account

Nintendo Switch Online Service Free Until 2018, Pricing Announced

Everything you need to know about Nintendo Switch Online

Level up with a Nintendo Switch Online Membership - Nintendo Official Site

How to Set Up And Use the Nintendo Online Family Plan