Convict

Convict is a villain from Newgrounds, that appeard in a flash movie Pico killed Cassandra in Pico's school. After he appeared in Pico vs. Convict, movie.

Newgrounds Rumble
Convict became a known character once he appeard in Newgronds Rumble.

1 of 4 Identity Theft
Convict first's fight on Newgrounds was against Tankman in Wartorn. As the text says:  The first step in Convict's elaborate plan to crumble Newgrounds is to collect the form of a trusted figure in the area, Tankman will do .

2 of 4 Ass Compactor
After Convict defeated Tankman, he convict Alloy & P-Bot in Junkyard.  Trying to take discrete route throught a junkyard, Convict flanked by two robotic pests. Mabye if he's sneaky, he can lure them under the trash compactor and save some time 

3 of 4 Passing the Torch
Once Convict lured them in the trash compactor, Piconjo found out about Convict's battles, and called him out on a battle in Piconjo's Manor  Piconjo has found Convict's warpath and is intrested in sharing the glory of toppling Newgrounds. He'll kill him to perserve his role. 

FINAL : No Prisoner
At the end, Convict gets into a cell, with Pico, Nene & S'Asshole, and his goal is to defeat them in the padded cell. Also, this is the hardest level in whole game.  It took three people to get Convict in to a padded cell. but will they be able to keep him in there?. Here's doubiting it. (inexperienced players beware, this is easily the toughest predefined battle in NGR). 

GHDG is King of the Portal!
Once Convict killed the three inmates, the story goes on:  Much to everyone's suprise, Convict disappeared from the public view rather than taking Newgrounds' throne. To a shapeshifter, being so known and identifiable was too risky. He would assert his power by pulling strings on the sideliens, making sure everything went just his way.