Dang it, I feel like I’m close to figuring it out:
1. There’s no mutagenic virus (September 19, 2016).
2. The existence of Aaron Marx, and his ability to hop among alternate universes.
3. The existence of dittos, not native to earth (explained Sept 12, 2016).
4. The Topsiders, whose use of a biosuit keeps them human even though there’s no virus.
5. The fact that you have to be unconscious when you transform in order to become a “cute anthro” rather than a horrifying monster (February 21, 2014).
6. The Lucranian Salvage Captain stayed on Earth for two weeks and did NOT transform (Sept. 19, 2016).
7. Aaron Marx does NOT transform.
8. Schism Syndrome, which even Wally knew about (October 29, 2014).
9. There’s a way to protect yourself against Amesworth radiation (February 4, 2010).
10. The invisible topsider.
11. The (apparently) topsider goggles and gloves that let you see and touch items that are invisible.
12. That comic book, of which there are at least 71 issues.
13. There are—or were, at the very beginning—humans who did NOT transform, even without a biosuit (Al and Hank, January 2009).
Dang it, I feel like I’m close to figuring it out:
1. There’s no mutagenic virus (September 19, 2016).
2. The existence of Aaron Marx, and his ability to hop among alternate universes.
3. The existence of dittos, not native to earth (explained Sept 12, 2016).
4. The Topsiders, whose use of a biosuit keeps them human even though there’s no virus.
5. The fact that you have to be unconscious when you transform in order to become a “cute anthro” rather than a horrifying monster (February 21, 2014).
6. The Lucranian Salvage Captain stayed on Earth for two weeks and did NOT transform (Sept. 19, 2016).
7. Aaron Marx does NOT transform.
8. Schism Syndrome, which even Wally knew about (October 29, 2014).
9. There’s a way to protect yourself against Amesworth radiation (February 4, 2010).
10. The invisible topsider.
11. The (apparently) topsider goggles and gloves that let you see and touch items that are invisible.
12. That comic book, of which there are at least 71 issues.
13. There are—or were, at the very beginning—humans who did NOT transform, even without a biosuit (Al and Hank, January 2009).