Actually, while I'm not a fan of any of the above (though Pokemon is reasonably entertaining), the combinations could be pretty funny. Pokemon+Call of Duty would be suitably bizarre, I'm not sure how Pokemon/Metal Gear (thinking of plot/themes here, not the stealth gameplay bit in particular) would work out, and...LegendaryGamer0 said:Pokemon.
Metal Gear.
Call of Duty.
I am a walking contradiction.
Well, Metal Gear/CoD? Fairly sure that'd work quite well, with a decent writer.
As for me, I'm generally the first to criticize my favourite games. I really like, for instance, Sacrifice, Rudras, Terranigma, Planescape: Torment and a whole bunch of others. A few that I'll defend (though not especially rabidly, I'm not good at that) are Iji and Hisoutensoku. Good as those games are, they're not my favourites, but they do lack any real flaws for the most part, aside from the oddness of the latter. Sacrifice doesn't have any flaws that stand out enough for you to actually notice them while playing for the most part, but they're certainly there once you stop to think.
Wow, I'm bad at this.
Edit: As the poster above said, SotC is pretty great. Don't have much to criticize there.
More edit: And now I have the answer to how pokemon+metal gear would work.


Or alternatively...

Metal gear?
Yes, metal gear. In perhaps the most literal sense possible.