Guilherme Lopes
From Equestripedia, the Archives of Equestria!
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Guilherme Lopes (October 8, 1959) is a Brazilian voice actor famous for playing Nappa and Mr. Satan in the Dragon Ball series. He also portrayed Optimus Primal in Transformers: Beast Wars. In the Brazilian dub of My Little Pony: Friendship is Magic, he played Tirek.