Double Subverted: But suddenly, Bob's dog was taken to the vet. In the version with the gender reveal that opposed the audience's thoughts, the dog went under Gender-changing Surgery offscreen (which wasn't mentioned at all).
Parodied: In Japan, Bob's dog wears a hat with the symbol "♂" in it. For the English dub, this symbol was digitally edited to look like the symbol "♀".
Zig Zagged: See Double Subverted. After that, it was revealed that the gender-changing surgery failed.
Bob's dog is female in the original Japanese version, and is depicted squatting to pee in an important scene to make it impossible to believably change her sex.
Every character's gender is the same in all dubs of the show.
One episode featuring Bob's dog revealed that its love was a male hound. So the makers Bowdlerized the Ho Yay.
Bob's dog was seen with feminine qualities in Japan.
(Subbed) "Be strong, little guy" (Dubbed) "Who's a good girl?"
Invoked: Not applicable. (This trope is beyond the control of the characters.)
Exploited: In Japan, a female dog was used as bait. In America, this dog was male.
Defied: Not applicable. (This trope is beyond the control of the characters.)
Conversed: "I've heard that Bob's dog is male in Japan."