One Google search for Pokémon brings up links to porn websites.
When searching for Pokémon X videos on Google, people browsing the internet can come across links to hardcore porn.
NSPCC spoke out to stress the need for parents to keep an eye on their children's web activity.
A spokesman said: "This shows the internet can be a Wild West, sometimes leading to children being exposed to unsuitable material.
"This is a growing problem that needs to be tackled."
Nintendo plans to release Pokémon X and Y on the 3DS later this year.
