What if Ben 10 in the Pokemon World

hmm not entirely sure I understand what you mean by your question, but if you were to mix the two, I picture Professor Oak giving Ash a poketrix on accident some how. This allows him to transform into Pokémon, it would also periodically unlock new forms, and if he used a form enough times, it could evolve. However Geovax, leader of team rocket would try to stop him. This would lead to Ash trying to defeat Geovax. In fact, that's likely how Ash gains the poketrix, Oak is fleeing from Geovax and as he's about to be caught, he uses a special device to teleport it away, it ends up in the abandoned Pokémon lab where Ash and his friends are hanging out (that's what kids like to do after all, hang out in restricted abandoned buildings) and Ash finds it.

 

If it plays out anything like the time he met Rex Salazar, at least for Ben it wouldn't be the strangest thing he has come across. Oh man, if you had like Ben 10,000 encounter Giovanni's 'Mecha' Mewtwo, that would be some clash. Yay for alt verses, amiright?

As for Ash 'n' co, it's hard to say. I guess you could take a look at every other instance where illusion was used to alter a Pokémon's form and theorise that from the gang's POV ol' Benjamin has to be using some kind of mystic reality skewing tech. After all, how else can a guy instantly combust into flames ala Human Torch style!

^Lovin' 'Giovax' there. Would his main Pokémon be Octillery or Malamar?

 

Probably malamar, though If the orginal 151 were all to choose from it would most likely be a tentacruel

 

Oh yeah, forgot about Tentacruel too. Hmm. I wonder if it's possible to match up other Ben 10 chars with appropriate Pokémon?

 

My brother and I were actually talking about how Ben's aliens can match Pokémon fairly easily, replace four arms with a machamp for example. I can see Gwen with an Abra, seeing as how she eventually develops magical skills, I don't know about grandpa max though

 

Well maybe ash but then one of is traveling companions would think he's nuts and explain that Ben is probably from somewhere else entirely with that sort of technology or something.

 

This concept seems pretty cool, but I'm probably sure there are ton of fics lying on Fanfic.net that dabble around this sorta crossover.
(Instead of morphing into the aliens that he does, it seems pretty cool that he'd turn into Pokemonm and I can just imagine trainers trying to catch him, XD .)

 

Oh, I used to love Ben 10 when I was five and six years old, and to have a crossover with Pokémon, something I love now... that would be interesting. I like the ideas mentioned before, but what about Ben transforming into Pokémon using an updated Poketrix he stumbled across?

 

Y'know, I could see this. I fantasized about transforming into a Pokémon way back in the Gens 1+2 days, but I only ever considered one Pokémon, not 10+, nor did I consider my interactions with other trainers. I don't remember in Ben 10 if he had to revert to human before becoming another alien first, but if he can jump from alien to alien directly, he could convince people of some pretty crazy evo paths.

First scenario: A poketrix-holder morphs straight from Venonat to Butterfree and convince people that makes sense (which it does), or something crazy like Sudowoodo to Shellgon and have everyone going all "WTF mate?"

Second scenario: A poketrix-holder actually does get captured and experiences what it's like to live inside a Pokéball/PC and serve the combative whims of their trainer/master, and once free, incites a revolution for more humane treatment of Pokémon.

I'd watch/read either of those.