Porygon (Team Rocket) was a Pokémon owned very briefly by Team Rocket in the episode Electric Soldier Porygon.

Porygon was a prototype created by Dr. Akihabara and stolen by Team Rocket. Ash and his friends borrowed a non-prototype Porygon to go inside the computer world to find it. When they encountered the trio, Team Rocket sent out Porygon to battle Ash and friends, complete with its own TR flag on its tail.

Sadly, when the vaccine was released by Nurse Joy, one of them hit Team Rocket, knocking Porygon unconscious and forcing Team Rocket to abandon it when escaping the explosion.

Banned Electric Soldier Porygon

This episode was banned after 700 Japanese Kids Seizures Or Mild Epilepsy/Blindness. The Cause Was Flashing Red/Blue Screens.

Part that made it banned WATCH AT OWN RISK

http://youtube.com/watch?v=2sKsBNkFhSM

--Bulbman 21:20, 9 August 2007 (UTC)

Team Rocket's Pokémon
Travel with:	Meowth	Rotom Phone
	Jessie			James
On hand:	Wobbuffet	Seviper	Yanmega	Mime Jr.	Carnivine	Yamask
On hand:	Woobat	Frillish	Gourgeist	Amoonguss	Inkay	Morpeko

In training:				Cacnea
At home:				Growlie	Chimecho
Released:	Arbok	Dustox	Mimikyu	Weezing	Gyarados	Mareanie
Traded away:	Lickitung			Victreebel
Lived with (all three):	Bewear	Stufful
Worked with (all three):	Delibird	Pelipper
Temporarily owned:	Porygon Zero	Shellder	Magikarp	Second Victreebel	Hoppip
Temporarily owned:	Mawile
Befriended:	Blissey
Status unknown:	Starmie			Pidgey	Numel
For a list of other Pokémon Team Rocket has commanded, see here and here