Doraemon (Demon, Horse, Wolf, Werewolf, Rat, Bull Transformations)

This cartoon is massively popular in Asia (and many other parts of the world)...so popular that thousands of episodes have been made. Storylines from the original manga have been adapted multiple times--one of them is "The Wolf Family." There are three versions.

The most recent and best version is episode 158 from the 2005 reboot. The episode starts with a random werewolf transformation that the characters watch on TV. Later on Doraemon (the superpowered robot cat) points a flashlight at his human friend Nobita, which turns him into a wolf. Nobita reverts at the end of the episode. I've edited the three scenes together:

An earlier adaptation of  "The Wolf Family" is from episode 809 of the original series. This edit includes the reversion:

And here is the very first adaptation, from episode 12 in 1979:

(The reversion is at 5:21)

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Another frequently adapted story is "Werewolf Cream," which usually begins with a random wolfman transformation and later features Doraemon himself turning lupine. The story has been adapated so many times that I have trouble keeping track of all the versions. 

The best one is from episode 53 (?) of the 2005 series, with the wolfman about 30 seconds in:

(For Doraemon's TF go to 1:49.)

I think the next clip is from episode 507 (broadcast in 2012), with the wolfman seven seconds in:

(Doraemon's TFs is at 1:51)

And this might be the most recent version, from episode 552 (broadcast 2019), with the wolfman at 16 seconds:

(Doraemon TF at 1:26)

For an older version, here's an edited clip from episode 1373 of the original series:

And if you want an even older version, the very first adaptation (from episode 97) can be seen here, but it opens with the least impressive transformation. Doraemon's TF is at 1:57.

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As for other creatures, here's a demon transformation from the Doraemon movie Journey to the West (ドラえもん 映画 1988 のび太のパラレル西遊記). Scroll to 39:35 if the cue doesn't work.

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In episode 189 of the 2005 series, Nobita turns into a horse:

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In episode 191 of the 2005 series (ドラえもん その日、すべてがネズミに! ジャイアン) every human in Japan turns into a rat (or mouse?). Start watching here for ear and tail growth, here for brief fur growth, and here  and here for further facial TF.

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Lastly, in episode 313 of the 2005 series, one of Nobita's friends undergoes a quick bull TF (at 6:10):

This episode was later remade in episode 560 of the same series! (Go to 09:04 if the cue doesn't work):

Note: I'm still trying to track down an episode that might have a transformation: # 1415 "Dog Nobita Nobi" 「のび犬のび太」 Any help will be greatly appreciated.