POKEMON GEN 6 ANNOUNCED

[Kriven]

animals have leaves now?

also if you'd go on with that quote
"In general, the protozoans are unicellular animals (although some have some plant or fungal features)"
they are still in different kingdoms of life, that's just a generalization of there behavior. which kinda shows that an entity can have traits of an animal without being an animal.
actually this kinda makes pokemon seem more like protozoans more then animals, since they also display traits of all other kingdoms of life

as a sidenote: I don't know if the golems would even be considered lifeforms, let alone animals, with the most common biological definition. they can't even reproduce, which is normally a deal breaker when trying to identify life forms.
viruses aren't typically considers life forms despite display some animal like behavior. I think that's comparable to at least some of the pokemon.

It depends who you ask. A lot of scientists and experts consider Protozoans as a subkingdom of Animalia instead of its own kingdom. There really isn't anything set about it, same with viruses, actually. These issues are pretty frequently debated and no definite consensus has been reached.

Also, yeah, some animals grow leaves or leaf-like appendages irl. Some can even perform photosynthesis.

Edit: The Golems can't produce offspring with known Pokemon. They might only be able to mate with members of their own species, and canonically there are only one of each.