Kiara is Simba's biological child. Simba has Kiara as the only child in the TLK 1 and 2 as said before Kiara and Fluffy are one content. Kion in just her younger brother only in the alternate storyline. I'd feel that he's adopted since he never existed in the sequel but it's only a different story were he's the guard of the pridelands as Kiara becomes the next leader.

boytoy_84
Kiara does not participate in TLK1, but only in TLK 2 and TLG. Kion is the biological child of Simba and Nala it is perfect copy of Simba.TLG not alternate history, but simply make a new Disney canon for TLK1 which is trying to sort out which of plot holes TLK 2 pumped into the story. Kiara is just a female version of Simba in which no drop originalnost.A and TLK2 not legal by the creators of the first film so that the second film is not canon.

I'm sure you didn't mean "legal". Legality has nothing to do with these things. These are all Disney's creations and neither The Lion Guard or Simba's Pride are the work of the first film's creators and thus are equally official to the first film - and so, you just need to pick which universe version and storyline you prefer. (The Lion Guard is less canon to the first film than TLK2 because The Lion Guard is a TV show unlike the first film while TLK2 is a film like the first film. But nonetheless both are official Disney canon and can be connected to the first film but only as separate entities if logic is desired to be kept.)

The film does not state or even imply that she would be adopted and therefore she is their biological child. PLEASE don't start the same fanfiction-belief crap with Kion that some Kopa fans are doing with Kopa. Because it's pointless. Hence, the fact that TLK2's creators have publicly and officially stated that the cub in the first film is Kiara and nothing in either films say anything about adoption. While common sense says that in The Lion King storyline which is essentially about the Circle of Life - in addition to generally as the "wheel of fortune" also in the biological sense (hence, Mufasa's lesson to SImba about eating the antelope and then their own bodies becoming grass), there's no need or place for adoption but a biological child is the concept that completes the Circle of Life.

Also, I don't understand where this desire to "believe" that Kiara is adopted comes from? Now that you have The Lion Guard which makes the cub at the end be a male in its storyline as in you can take The Lion Guard alternate universe path and have your precious male cub for Simba and Nala actually be canon. Why do you feel the need to "believe" that Kiara isn't their biological child? You already have a male cub option for the cub in the first film. Why isn't that enough? Like, if it's about that you just don't like Kiara as a character/person...Imagening her be adopted isn't going to change the fact that her personality is what it is.

Think whatever you want, guys. Disregard facts if that makes you happy. Just please realize that your beliefs are not official canon. So don't continue/start parading them as if they were.

^^ LionKingFans, TLK 2 is truly a canon film and sequel of the first film. Kiara is participated in the first when the creators of TLK 2 said so. The first film creators didn't think of a sequel at the time that's why Fluffy is left without a gender till TLK 2. Fluffy is never a male but a genderless cub then it becomes Kiara. Kion isn't a canon character to the films since he only exists in the children's Disney Jr cartoon series, with a ridiculous magical roar that blows anyone away like a hurricane. TLG is a very pointless TV series that was ever created in TLK franchise. Animation is horrible, voices aren't the same and most of all, Kiara never had any siblings. Your beliefs of Kion being Simba's biological child is in your on fantasy bubble. Kion IS only an alternate character and Kiara is their only child in both films. Kion is a useless character anyways that's created just for little kids. Kiara is far more canon than Kion ever will be.

Kiara is the biological daughter of Simba and Nala!

Of course not she's they're real daughter