I'm gonna go with the obvious one and have my favorite (Flareon)
I can imagine going for a walk with my Flareon strolling happily behind me then some couple go to me and say "is that a Chichuaha?" XD
I'd reply "Burn them..." as my Flareon unleashes it's Flamethrower
I'd also have a Voltorb/electrode and paint it to disguise it as a football so when some kid is about to kick it... *BOOM* XD.
Nah, thats just cruel, i'll stick to having a Flareon, a Chikorita, a Staraptor,a Lopunny (not for that reason
i just like cute things), a Ninetails and a Pikachu with VoltTackle...
It'l be like an episode of Digimon except it'l last alot longer and still be entertaining