Theory: Mario's Planet's Sun

Abstract
Mario's Planet’s Sun is composed of at least 73.46% hydrogen.

Arguments

 * Argument 1: When looking at Super Mario Odyssey through the Neon filter, every object emits a colourful outline.


 * Argument 2: One of the most prominent wavelengths of hydrogen’s spectral signature is 486.1 nanometers, which produces a bright cyan.


 * Argument 3: This exact shade of cyan is produced by Mario's Planet’s sun when looking at it through the Neon filter.