Screenshot by Thekingplayers
Miis have always been customizable enough to the point that you can make them look like most characters. However, Miitopia's remastered Mii customization features prove you can replicate anyone, even the Mona Lisa.
But if you don't have the skills or the time to create these characters, don't worry. Miitopia allows its players to share Miis thanks to unique access codes. Just like any online service on the Nintendo Switch, however, you need a Nintendo Switch Online Membership to receive these Miis.
How to receive Miis in Miitopia
Screenshot by Thekingplayers
1. Access Mii characters from the title screen.
2. Open the menu and select Add Mii Characters.
3. Select Receive.
4. Select Access Key and enter the access key code of the Miitopia player sharing their Mii.
Once you receive the Mii, it's yours! You can even make changes to the original design if you want anything changed.
Best Miitopia Access Key Codes
Fire emblem
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Genshin impact
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Minecraft
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Pokémon
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Sonic the hedgehog
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Undertale et Deltarune
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Related: Best Jobs (Classes) to Choose in Miitopia
Atlus
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Nintendo
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Sony
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Square Enix
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Other video game characters
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Cartoon Network
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Nickelodeon
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Other cartoon characters
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Related: What is the max HP and MP Sprinkle upgrade in Miitopia?
Anime
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Hero
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Other characters
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Finally, note that Miitopia players sometimes lock their access keys, making their Miis unavailable for sharing. Fortunately, Miitopia is a community game. If other players downloaded the Mii while it was still available for sharing and their passcode works, you should also be able to take that Mii from their pool.
For more help with Miitopia, check out All Jobs (Classes) in Miitopia, Explained, and Best Personalities to Pick in Miitopia on Thekingplayers.