After their latest defeat on the Excess Express, the Shadow Sirens are running out of options to deal with Mario and crew. Marilyn has an idea, though - they can't stop them from reaching Poshley Heights, but what if they never leave? 

A commission from SightShade. I admittedly have never played Paper Mario: The Thousand Year Door, which is the Mario game in which this is set, but I hope I did a decent job at least.