i'm trying to find some.
googled already, but none of the results are able to come up with combos.
most of them are flatground generators.

I made both a Excel and Flash trick generator but it's flatground based. Shouldn't be too difficult to add combos in though.

It is pretty simple to generate a random string in excel: http://www.extendoffice.com/documents/excel/642-excel-generate-random-string.html

The hard part would be to think of all the variations! What I did was I separated the random generation out. First it would randomly pick the stance (reg, sw, nollie, fakie). Next it would randomly determine if there would be any spin and which direction (none, 180 or 360 / Fs or Bs). Then I'd generate the actual trick (kickflip, heelflip ect).

All you would need to do is then add additional variable for the grind or manual or w/e after.