Hopefully there can be more than one partner Pokemon though, for different stages. I don't mind Cilan with Pansage since it's not seen all of the time, but I would have rathered Emolga/Excadrill and any one of Ash's other Pokemon.
I hope so too, it would definitely make this whole thing more interesting if they aren't restricted to only using one Pokemon. Plus we can get to see more Pokemon out doing something other than just battling, which is always good, because that's when their personalities start to show. Well Pansage has had more appearances recently which is nice since I like it the most of Dento's Pokemon. Would like to see Stunfisk doing something though so we can see how his relationship with Dento is. Oh and Emolga/Excadrill would have been good too for various reasons.