Remember the Oasis Simba is brought to by Timon and Pumbaa? Well in the game, Kingdom hearts 2 in the first visit to the pridelands, one of the lioness states "We should cross through wildebeest valley and live in the Oasis but no! Scar would never let us!"
This could mean Scar was MAKING them suffer. It also could be how Nala found Simba while looking for help because i doubt she just found the oasis by luck in such a big desert.
Note: Some people don't consider what happens in the pridelands as cannon (which is strange as it's the same storyline as the movie. Scar kills Mufasa, Simba runs away, he comes black and reclaims the throne. Kiara is even in the game! The only thing i wouldn't count as official would be Sora, donald and goofy being there as well as the heartless and pete. Maybe because it isn't fully disney but a collab with squeenix) but Disney does play a part in this game