Archeops

The battle isn't over until you have fainted, but unfortunately Archeops does not believe that this is the case. Archeops's impressive base 140 Attack and 110 Speed are held back by the combination of its poor defensive typing, subpar defensive stats, and Defeatist, which halves Archeops's Attack and Special Attack stats when its HP falls below half in battle. This makes life difficult for the ancient bird, as just about any attack will cause it to give up on the battle—provided that it doesn't just outright faint from the attack. To make things worse, with Steel-type Pokemon such as Metagross and Scizor making a return in VGC 2012, there are a lot more Pokemon that are able to take Archeops's moves head-on. Although Archeops can be tricky to use, it can be a powerful force if you can provide support to it and keep it from giving up on the battle too early.