By complete accident.
I had already given my three choices in the sign-up page. A discussion happened over whether video game characters with anime adaptations counted. I jokingly said Eggman from Sonic X. Light decided to add him to the tournament and that beautifully rotund bastard actually made it into the Top 20. Eggman ended up losing a tie vote so he could have gone even further.
My joke suggestion beat the absolute stuffing outta all of my genuine suggestions. None of those ones made it into the Top 50.