Satoshi & Touko
Peanuts aren't just a nut.
this might not be so farfetch'd. XD
I mean the gym match against Olympia looks like it might be a two on two match. Ash could go at it solo (like usual) or maybe hell get help from Serena.
Im not too sure of the pyroar, but the meowstic might be a possibility or perhaps another pikachu. (since theres already been rumors going around about Serena catching one)
Most likely im over thinking things so feel free to disagree. XD
Oh my goodness! If Serena were to catch a pikachu, even I would feel safe believing that Amourshipping would really become canon. I could also vision Serena getting pikachu meaning that this would be the last of the series or that there is just one more region. I have at times thought that this could be the last of Ash's saga.