According to a Roller Coaster Magazine the name is not 'Kater'. It is 'Han Katten' and that makes alot more sense seing as 'Kater' doesn't mean anything in danish, and in the other hand 'Han Katten' means Male Cat, and knowing Bonbon Land's screwed up names, that seems more right.
Also, the layout is this one, just with spinning cars.
Here
I think this is a great addition to Bonbon Land, and it is quite funny, this is the first Gerstlauer Spinning Coaster to Europe, and the first Eurofighter was first constructed at this park. Now we just need to new Gerstlauer Launch Coaster to Bonbon Land.