Yes, that's a heart emoticon. Blame Memory.
Those of you with Diamond and Pearl are probably aware of the Global trading Station in Jubilife City. This facility, which operates through Nintendo WiFi Connection, allows you to put up your Pokémon for barter with anyone around the world. Theoretically you could have no-one around you and you could get a Pokémon badly needed for Pokédex completion or your party. While the GTS allows you to search within your Pokédex only, it's otherwise fun to put your Pokémon up or see what others want for theirs.
For me, I also like looking at locations on that massive globe. You can register your permanent location there to see where all of your Pokémon come from, and if you're like me you'll want to rack up as many locations as possible.
I first paid attention when a thread appeared on SuperCheats concerning people using Action Replay to obtain Pokémon and quickly put them up for a cheap deal. While this is possible, the really funny part is actually examining the offers: When I was looking for a Dialga, some had it at around level 70 but wanted a level 100 one in return, a complete paradox. Then again, a lot of the requests I'd seen made sense considering I grew up in an environment in which legendary Pokémon were always a precious commodity. While I was screwed as far as searching went, I could simply put a Pokémon on offer and wait a few minutes for a response. I was thus far able to trade:
- A level 52 Whiscash, fresh from the wild, for a Spiritomb — which came from Japan at level 1 (newly hatched) and infected with Pokérus
- A level 63 Altaria for a level 26 Milotic from New York
- A level 7 Jirachi for a level 70 Rayquaza from Pennsylvania
- A level 52 Hippowdon for a level 46 Torterra from Michigan