Blue Plastic Tracks

This may be a silly question but I have wondered since I know very little about trackmaster 2 compared to the original trackmaster and tomy eras if the trackmaster 2 motorized Kevin only worked on road or rail or both

I don't know myself but good question Argo.

Trackmaster 2 Kevin is essentially like a trackmaster engine.  So it will run fine on tracks.  As for the road, you can try running a trackmaster 2 engine with the spikey wheels and see if it works.

Alright! 
The original helping hook Kevin released for Hiro of the rails works on both TOMY and HiT road with his 2 flatbeds rather well but does NOT work on any railway track (new or not)
I'm afraid i don't own a TM2 Kevin but i know he works on TM2 track and slightly on the original like all other TM2 engines .

Honestly why did they have to turn kevin into, basically an engine. He now looks extremely chunky and nothing like what he looks like in the tv series. It's a bit like how they butchered Carly in Series 25.

It reminds me of the newest plarail bertie in a way

there is no way to house the battery if kevin doesn't look "chunky"  Same goes with Harvey.

If Argo is thinking about the motorized Road Vehicles...maybe they could have made a Kevin like Terrence, Ned or Jack (wasn't he motorized too?) which would be much smaller and run on a AAA or 'N' size battery.

You have a very good point super.   The Plarail and TM push along Non motorized Kevin's are defiantly the best in terms of proportions

I don't know what were they thinking... This motorized Kevin is now - a train? Or what? 

He looks weird. They turned him into a locomotive so he looks like some track-laying train loco or something like that... In any case, it's not Kevin anymore. Kevin is a clumsy little four-wheeled crane, not a locomotive. This is Kevin: 



That's much better. And he can be pulled by an engine, if necessary.