Mii Factory Fact of the day: On Pikmin Bloom if an accurate recreation of any of the default Mii Characters the app has is made in the My Nintendo Mii Studio and chosen as the player's Mii, after leaving the in-game Mii Maker and entering back the game'll show you chose the default Mii Character instead of the recreation. In order to this to happen, the Mii has to be 100% accurately recreated, facial features colors don't matter but position of them, body build and favorite color do. Here's a demostration featuring Brittany as the test Mii.
If you want to try it by yourself here's Brittany and Mochi's Studio format: Brittany: 0800400308040436030d0301070807020b0000010000010804000a0100484004000214031302130d04000a01030a Mochi: 0800400308040431030d0101060409020a0000010000010804000a01015f4004000214031302130d04000a02010a