Currently have a Blue save where I'm playing through with a Monotype Poison team. Even naming them after various poisons!
Trainer Name:
Botulin, after the deadliest poison known to man, Botulinum Toxin.
Pokemon:
Beedrill: Oo-Suzume, after the venomous Japanese wasp Oo-Suzumebachi.
Zubat: Belladonna, another name for the infamous Deadly Nightshade.
Nidorino: Cnidocyte, the name of the poison that most poisonous mammals secrete.
Bellsprout: Oleander, the deadliest plant-poison known to man.
I plan on finishing off my team later on with a Tentacruel, whose name will relate to the Box Jellyfish, and a Muk, who I'll name after some deadly man-made poison.