hello pro pokemon trainer akio here
the 1 health gym glitch can be solved by using a poison type pokemon to finish them off.
will test this tomorrow on my home from work.
do you own any gyms? I want to own this one because it's really low right now (like 2k) and I want to get defender bonus or whatever.
EDIT: Wait, I'm pretty sure I did this with my oddish?.. he's a grass/poison?