[Stanley the Bugman]

All right, so how this goes is that I'm going to post a topic Mario related, and the person after me will post something related to the topic and then the person after that posts something else, and etcetra. When the person who posts the 13th topic related response, they choose the next topic. For instance, I choose a topic and the first answer,

Topic: Spin-off Mario titles.

1. Mario Tennis

then the next person would respond

1. Mario Tennis
2. Mario Golf

and so on and so forth....

So anyway, here's the topic:

Characters who have appeared in only one Mario game:

1. Mallow