A pathetic Pokemon. There isn't anything really good to talk about.
Ability: Sand Veil
EVs: HP, Defense, Sp Def Nature: Calm
Sandstorm: Raises evasiveness while damaging the foe.
Toxic: Inflicts bad poison.
Pain Split: Provides healing for Maggyo while also damaging the foe.
Thunderbolt: In case the foe has Taunt, Maggyo has this. STAB.