My vote is an okay, so long as there is at least one or two people who you can trust not to be biased in or against you who know everything you plan to do with it and you clear almost everything you plan to do with first. Otherwise this is going to be an ample test to gauge whether or not you can be trusted with something like this ever again.

Yeah, agreeing with Verax.

Beri: Like, people will be forced to drop whatever they're doing to go Genesect hunting.

I nominate myself as an impartial assistant for this plot, as I care to join, and am generally unbiased.

I'd say you are, Crewe.

I'd vote go ahead and implement, but if possible try to keep events to at most "makes the tabloids but not the news" chaos levels.

I'm still not a fan of the idea, but so long as I'm not called upon to participate I guess there's not really any point in objecting.

I'm voting for a final check for possible tweakings, just to make sure things work with changes to current plots, etc. From there it should be pretty well set to implement.  My main concerns are 1.- what Tangent says and 2.- since the apex predator in question is taking residence in the Lumiose megahabitat (heh, "mega") at least for a while, I'd like to see made sure that the effects on the wild mon population are Show, Don't Tell. As in, have them actually have some onscreen effect that is not just passed over.

Umbra: Re Maekrite subplot, Crow has similar concerns about Maekrite should stay a Nidoking. However the in-character way for him to "deal with it" would probably be some time of brooding while he undergoes a Mind Is a Plaything of the Body to become the Ruthless Go Anywhere Devastation machine that a well-trained Nidoking should be. Not to mention a growing enmity against Silent. I'm afraid the whole thing, while interesting to play out, would not be very likeable (and, honestly, it's more or less what I already have Inka for in the AU...).

Silent: Huh? Why would that happen?

And now for something completely different!

Okay here's the short two-word version: time travel.

The longer version:

Basically, I had the idea of a subplot of X number of characters getting caught in time travel shenanigans and ending up at each of the various arc climaxes, where they either have to get the heck out of dodge, or alter something that normally wouldn't happen so that it will happen, just so time can go on it's proper course. Obviously, it wouldn't be a major plot, just a subplot that people who want to be involved in can get involved in.

And yes, there is definitely some need for tweaking to this idea.

I really don't like the idea of people going back and changing things in the past. Going back to spectate is one thing, but I am against actually getting involved with the events.

I don't have that much of an issue with the former, but I do with the latter for reasons that Beri, Crewe, and Straw have already mentioned.