It's also literally the same design as a Rockin Tug, but extended, and that's nowhere near a coaster.
I guess you could say it's a matter of perspective, but I'm not sure that's the phrase I'm looking for. Half-pipes and Disk'Os are pretty much the borderline of coaster/flat-ride, with half-pipes barely considered a coaster, and Disk'Os barely considered a flat ride.
Yes, but Rockin' Tugs and Discoveries are very similar rides that are also powered along the entire course. If you count the Disk'O as a roller coaster, then you have to count those, which no one does.
Size and vehicle type are both irrelevant (unless it is fairly obvious that it isn't a coaster. e.g. a KMG Afterburner) when deciding whether something is a cred or not.
1: Does it coaster? If it does then there is a high chance it's a cred, I count the snails at Joy Land as a cred because they totally coaster.
2: What does the manufacture say? No that isn't a parody of The Fox song, if it is listed as a coaster then there is a high chance it is one.
3: It appears on RCDB/Coastercounter
If the case of these they are listed as coasters on the website (http://www.zamperla.com/en/zamperla-det ... ko_coaster) but I don't know anyone who counts them as one. I'm not convinced that they coast and they don't appear on the sites listed in point 3.
Thats how I decided anyway.