You are given a budget of 10 points to change a Pokemon. What changes would you make to better a Pokemon?

Purchase (cost points):
>5 Points
= +5 HP, Att, Sp. Att, Def, or Sp. Def
= +1 Speed
= 1 move with BP between 50-75 [secondary effect cannot exceed 30%; 100% chance moves like Low Sweep/Icy Wind allowed; multihitting moves not allowed]
>10 Points
= +5 Speed
= 1 Physical/Special move [secondary effect cannot exceed 40%; power cannot exceed 150, unless Self-Destruct/Explosion]
=1 stat boost move [2 boosts max]
=1 non-damage move [no Spore]
>15 Points
= Ability change [exclude: Super/Huge Power, Wonder Guard, Arena Trap/Shadow Tag]
= 1 move [no restriction]
> 20 points
= Ability Change [any]

Sell (gain additional points):
> 5 Points:
= -15 to highest stat [you can only choose if tied]
= - top 4 highest base power STAB moves it can normally learn [can only use this as many times as you have types, once per type]