For the top, both the names are kind of hard to read and the art styles clash in an odd way. It just looks weird and nothing stands out in particular. The oddly bright RED and BLUE sort of do then Charizard and Blastoise sort of do then Red and Blue themselves sort of do and in the end it's really just trying to draw my eyes in every direction at once, with the background even competing for attention, particularly against the less colorful RBY sprites. It's a good idea but frankly I would scrap this version and take a different approach. Perhaps try it again in reverse with a RBY Pallet Town instead of Fr/Lg so characters can stand out. The text also needs work though, beyond blending in (seriously, why green for the vs. when the only thing it's on top of is grass T_T). Font choice is not ideal, nor are the colors chosen. Use some some more complimentary versions of the colors for the picture. Also consider making it clearer that it's Pokémon Trainer Red and Pokémon Trainer Blue.
For the bottom, I like the idea but I don't think it really works to create a clear contest picture. The names are sort of there; not a problem but not the best part, but the rest of it is sort of a mess in terms of it seeming to be made up of ghosts of varying levels of transparency. I can barely make out the existence of a 2D representation of Ridley in there, but the rest is all needless chaos that detracts from the character. As a whole, it's not an incredibly effective gimmick. Especially without a background, likely stemming from the fact that it's already abstract enough and a background would just completely kill any chance of clarity and clutter the picture up far too much-a consideration you should definitely have in mind when making these. If it's too cluttered without a background... it probably needs to be cleaned up in a way that makes it presentable with a background since those add a lot to the picture. Additionally, I'm of the personal opinion that if any form of Samus is being made the focus, it should be Varia suit Samus-the most widely recognized form, rather than the less powerful and weaker presence of the default Power Suit.
As for your actual question, honestly it probably can get accepted. I just like to give extensive constructive criticism on match pic submissions, especially since you definitely can make this better.
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http://www.nbc.com/parks-and-recreation/exclusives/ron-dancing-animated.gif