Landorus pissed me off because it's just a gimmick to get you to buy Black and White despite GTS existing. I never got around to capturing it because I wasn't going to buy Black for 2 Pokemon (my girlfriend has it but never bothered hunting down Tornadus). I'm torn on the whole trio because I felt it was entirely lazy for all three of them to be so similar in design but they all have an overall ok design at the same time. Regardless, Landorus is definitely my least favorite designed of the three, so having to jump through the extra hoops to get it is bothersome. I'm not a fan of Lando's new form, but at least all three don't look the same now. All three managed to hit OU tier, but not quite make it to Ubers, but like I said before, I pretty much never use Legendaries even if they are in OU.
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http://i.imgur.com/Aj7qk.gif