Another good way of dealing with Deo-D is Torn-T + Genesect. Lead with Torn-T, which is a great lead anyway, and U-turn out, wasting Deo-D's Tanga Berry, if it has one, and then go to Sect to finish him. The best part is that many Deo-D will use Magic Coat against Torn-T, wasting a turn, and often accomplishing nothing at all.
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