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Raikou is my favourite! He looks awesome and he's super speedy!

Actually, there's nothing wrong with using legendaries in a fight. Untrained legendaries are weak and can easily be beaten if you're good enough. Kids with full teams of freshly caught legendaries are no match for a well-trained, non-legendary team. A well-trained legendary team, yes, is super powerful, but if you're up against one, the only way this is cheap and douchey is if you and your opponent agreed to a non-legendary fight beforehand and they still went and brought legendaries anyway. But if you agreed to No Holds Barred, or at the very least to allow ubers, then it's just s**t luck on your part and you have no right to complain.

Are you just parroting the "popular opinion" that legendaries are douchey without really giving it thought?

Mew or Celebi.
Mew because its so cute and theres really nothing to not like about it.
Celebi for the same reasons and its just strong :]
I waited in line for two and a half hours to get one.

entei. him and raiku are the only legendary I do not consider OU by little kids. (you know them. the little hyperbeam spamming midgets that get pissed when a I kick their a** with my ev trained quilava and ch'ding the farfetched from firered.) because I have not encountered a little kid who voluntarily used an entai when he could use ho-oh with sacred fire.
I have even decided to ev train my entai from leafgreen. and will do the same for raiku when I obtain him in hg/ss.

that aside I do have a soft spot for entai that dates back to my first silver version. I go halfway through then decided that I hated bayleef with a burning passion. so I used a gameshark when it was time forr him to evolve and evolved him into an entai mrgreen . I loved that entai like it was the best friend I didn't have in real life. trained him all the way to lv 100. then I traded him to some girl for an awesome black charizard mrgreen . I shoulda cloned him...