Jimmy Neutron Character ?

I think everyone knows this funny little episodes of the big headed jimmy..

there are only a few episodes where there is a character which i am looking for..

The name & some pics of him

The person i'm looking for is the foreign exchange student, I think german origin..

He always goes: Slap Slap Slap, Clap Clap Clap..

Anyone?
Feel free to whine :D