Well those Hummer games appear on Trump Grand consoles quite often (I have a couple of Power Joys with them on) along with Inventor games and others - I think Trump Grand licensed games from quite a few companies really. and since so many DreamGear consoles are rebranded Trump Grand stuff, its not surprising to see them on there.
Bar Room Shootout is made by Nice Code though AFAIK - where did you get NTDEC from? Hurry Burry and Dringle are Nice Code too (if you look at the CHR of the Waixing version of Hurry Burry there's a bit of leftover "Nature Color Game" copyright)