Tell me what you think...
It's well done. Very good use of video; you definitely put time into it.
If you DID decide to go more in-depth, I would recommend voice of course, but that's just me.
But in the future...please spell Isaac's name right. Sorry if that's nitpicky, but, well...that's my name, and I can't tell you how many times it's been misspelled that way.
Looking at now and pre Brawl, the situations are just to dissimilar to say. Lucario had a lot of staying power because of Brawl, which was released in the middle of Gen4. Smash4, meanwhile, is being released after Zoroark's generation. And Zoroark has almost ceased being promoted as well. The fact that it's being released at the end of the generation is very important because Genesect is the last Pokemon of Gen5. It's the Pokemon that many will remember going into the early stages of Gen6 because Genesect was promoted, however lightly or heavily, not to long ago.
Now that I type that up and actually read it to myself, it sounds like a fancier way of saying "muh recency."
...
Oh well. I typed it up already.
Eh...with the Zoroark vs Genesect thing, I do feel like it's closer "Lucario vs Darkrai." Not to the same extent, but Zoroark is, I believe, Lucario's 5th gen mirror in terms of promotion. If I remember correctly, the initial XY trailer, in which they first showed off Sylveon and Pokemon Amie, featured Pikachu, Lucario, and Zoroark. I think Zoroark is much more akin to Lucario than Genesect.
But maybe that's not all to consider; just because Zoroark is Lucario's 5th gen...uh...equivalent (?) doesn't mean it'd be a better or more likely choice than Genesect. Still though, between the two, I'd go with Zoroark.