Well if the ability to trade eggs at the very beginning of the game is going to be kept from platinum in these newer games, then my 'starter' will be a level one eevee. So, it will follow me the majority of the time post game, unless I'm hunting pokemon. That's what my cubone/marowak is for. =P
I'm not a competitive battler, I'm more of a contest person, or in this case I think I'll be pro pokethlon. :3 That means I have tons of pokemon I love, like pets/family. they'll be contest pokemon. I'll have to trade them to platinum and back for ribbons, and pokethlon pokemon. That's more my style.
imagine this: wailord is following you around.
trainer:"lets go to the pokemon center Wailord!"
trainer: 'huh? what's wrong Wailord?
trainer: "no, Wailord!
Wailord:*crashes through the pokemon center, causing panic and confusion*