Dude that's harsh.If Serena doesn't get this flabebe then I doubt she's ever gonna catch anything, not that it's necessarily bad considering her role is to be Ash's love interest and pokemon just gets in the way.
well dex entries are inconsistently represented in the anime and always have been O:
Ooh I agree. It will probably be very similar to the episodes in which Max bonded with a Pokemon, only to part with it at the end of the episode.I want Serena to catch that Flabebe, but perhaps that won't happen. Most likely scenario would be that Bonnie would bond with the Flabebe for some time, and Ash and the others would probably help in searching for it's flower for the rest of the epsiode.
When they locate it's flower, the Flabebe and Bonnie would have an emotional parting and just go their seperate ways.
Pokédex entries don't really mean much and often contradict with what we see in the games or even in the Pokémon's designs. I doubt the flower is an actual part of a Flabébé's body.