Mii

The Mii is a digital avatar used for the Wii and the 3DS.

Tropes used:
 * Audience Surrogate
 * Development Hell: Nintendo had planned an avatar system since the Famicom era, but had no way to impliment it due to technical limitations. More info here.
 * Nigh Invulnerability: If Pilotwings Resort is any indication, Miis can survive lava. Let that sink in.
 * Powerpuff Girl Hands
 * Raymanian Limbs: This happens to a Mii's arms when playing most sports.