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My Best teacher is most certainly Mrs Garner, the nicest teacher ever, she was AND actually a good teacher. she was one of those who knew how to teach children. and then there is mrs faulkner, THE most evil b***h around. Why? well, if you had a fagash, sexist, old and crappy teacher who hates...
1) Think about what i want e.g what wall will i need, who's my lead, what types are my sweepers, moves ect.
2) Get the Pokemon I want
3) do any last minuite corrections, and make sure i cover everything I need, especially that my team isn't vunerable to a particular Pokemon
and... thats it.
Quite frankly, i only have room for one Rock type, and that place is reserved especially for Tyranitar. and then, if it isn't, i'd still use Rampardos (Scarfpardos) instead.