Both Krrish and Krrish 3 ruin the fairy tale ending Rohit and Nisha get in Koi Mil Gaya. It would've been fine if there were hints in KMG itself that it would have a sequel. But the movie ended perfectly and didn't need a sequel to take the story further.
Krrish movies not only take the story further, but also gives horrible fates to the characters of Rohit and Nisha. Sequels most of the time aren't as good as the original films, whether it's Bollywood or any other film industry. So it's something which is forgivable for me, but the route they went with the Krrish sequels after Koi Mil Gaya was unnecessary.
21