A charity for people with facial disfigurements has criticised the makers of Moshi Monsters for creating characters which, they say, reinforce negative views of people with things like scars and spots.
Changing Faces is urging people to sign a petition to force Moshi makers Mind Candy to change the name of some of their evil characters.
They say names like Fishlips and Freakface make kids connect disfigurement with being bad and could encourage bullying.
Mind Candy say they're sorry for causing offence.
Changing Faces says it is particularly concerned about a group of "bad" monsters called Glumps which were introduced in 2011.
James Partridge, the founder of Changing Faces, says calling a character from a children's game Freakface is "like something from the dark ages".
He added: "I'm very surprised by how extraordinarily stubborn some parts of British business are to getting into the 21st Century."
Mind Candy said it is "very sorry that any offence has been caused by our characters".
The company said it was surprised that Changes Faces had launched a petition because it has been talking to the charity since March 2013 and has discussed the possibility of developing storylines to support the charity's work.
It's not the first time Changing Faces have criticised a product in this way. Last summer they made a similar complaint about Lego.