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Umm I think if you use SelfDustruct or explosion it's still going to die..Becuase swift is supposed to be the move that "Never misses" But when someone uses fly and you use swift it still misses so yea thats why Pokemon has alot of flaws.
EDIT: maybe emerald has a glitch right there, cause i think maybe its attended feature, for a pokemon to sacrifice itself to bring down another pokemon, even with focus band.