Fuse Teppō Musume no Torimonochō (Dog Transformation)

Fuse Teppō Musume no Torimonochō (伏 鉄砲娘の捕物帳, "Fuse: A Gun Girl's Detective Story") is an anime feature film, and "fuse" refers to a race of half-human half-dog beings who consume human souls. Shino, the fuse star of the film, looks human, but with each soul he eats turns more dog-like, so that by the end he resembles a lanky werewolf. The final transformation is well animated, with muscle and fur seeming to stream across Shino's body.
This clip was edited together from several different scenes in the film, so keep that mind...

Zombillenium (Demon Transformation)

Zombillenium is a "bande dessinée" from France. Volume One has recently been translated into English, but for this update I had to use scans from a Spanish translation.
The Zombillenium is a themepark for supernatural creatures. Into this stumbles a normal human, Aurélien, who gets bitten by a vampire and a werewolf, and starts to change...but into what?.
One thing I should note--the pages used here are collages of different panels edited together by yours truly. So if they seem disjointed, don't blame the artist!

Anyway, we first see our hero gradually start to transform, with growing hair, ears, and fangs. I confess, I threw in the last half of this page just for beefcake...

Aurélien gets a lowly job at Zombillenium, but the irritation from a yappy dog causes his monster self to emerge...

Yup, it's a demon. Following are several unrelated scenes of Aurélien showing his demonic side.

Eventually we see his full-grown devilish form, and it's a beauty. As the last panel demonstrates, the French are more casual about nudity than us uptight Americans.

That's all, alas. The second volume doesn't have anything worth excerpting here and I'm not aware of a third.

Brady's Beasts (Werewolf Transformation)

Brady's Beasts seems to one of those Canadian cartoons that never aired in the States. In episode 16, "How to Date a Werewolf," we're treated to a gradual transformation. It begins at the 7:05 mark (to which the video is cued), resumes at 8:06, and finally kicks into high gear at 8:50.

The Art of DanteVergilLoverAR (Werewolf, fox, and dragon Transformations)

I was recently contacted by the artist DanteVergilLoverAR, who asked if I could include a link to her artwork. I'm happy to do so, since I'm familiar with and have enjoyed it. She's drawn many werewolf sequences in strong-lined style, and her werewolves are hulking, snarling monsters with pounds of rippling muscle. Besides lycanthropes, she's also featured dragons, foxes, and hyenas. Of the sequences that involve male transformees, I can point out the following:

"Full Moon Cocktails": 01, 02, 03

"Carnal Eventide": 01, 02, 03, 04

"C.E.": 01, 02, 03, 04

"The Date Request" (werefox): 01, 02, 03, 04

"The Curse Within": 01, 02, 03

"Crimson Moon Night" (dragon): 01, 02, 03, 04, 05

"Amative Curfew": 01, 02

"Birth of the Weredragon": 01, 02, 03, 04

"Dragon...iade" (dragon): 01, 02, 03, 04, 05

"Wereyena" (hyena; one-panel)

"The Promulgate": 01, 02, 03, 04

"Delphic Item": 01, 02, 03, 04, 05