Pokemon rules,
anyway the CURRENT use for pets is this:
1) Use them as walking Billboards, Valentines, Insults, Dirty slogans.

(You didn't hear that from me!)
2) Parade, I've done this before.
3) Pure annoyance. [SIZE=0.1]Trading the eggs on the tables making them hatch and hearing the responses from everyone in the room...[/SIZE]