Superman has suffered the following effects upon exposure to various pieces of red kryptonite:
being turned into a dragon,
a non-powered giant,
a dwarf,
an ant-headed humanoid,
a lunatic,
an amnesiac;
being made unable to see anything colored green;
growing incredibly long hair, nails, and beard;
being rendered totally powerless;
growing fat;
gaining the ability to read thoughts;
growing a third eye in the back of his head;
losing his invulnerability along the left side of his body;
being split into an evil Superman and a good Clark Kent;
being split into young and old forms (Superboy and Superman);
being rendered unable to speak or write anything but Kryptonese;
growing an extra set of arms;
becoming clumsy;
swapping bodies with the person nearest him upon exposure to it;
transferring his powers;
rapidly aging;
multiple personality changes;
and having his skin rendered transparent, overloading him with solar power.
In Krypto the Superdog, effects on Krypto include temporary amnesia, losing all super powers, body-swapping, and causing Krypto’s tail to detach from his body and come to life.
