dont forget about spikes, stealth rock, poison, burn, hail, sandstorm.
Always use a focus sash with shedninja, and focus just in attack, it doesnt have a special worth mentioning in public. Speed and Attack, likely any attack or speed boosting nature (that doesn't hinder the speed or the attack) will be fine, because his defenses dont matter...
Rotom is kinda cool, but should only be used with extreme skill, avoid it till you think you can use it properly
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Pokemon Pearl FC: 1246 8215 6085 ===== Pokemon BR:5412-6943-09369
Massi4h is my sensei; Respect him.

Im in ur brawl, smashin ur brawlers