Well back in DBZ, Toei always tried to make Yamcha look good. Even in the training scenes they always made him look more competent than Krillin.MainJPW wrote: Good point about Yajirobe, this is the stuff that gives me the impression that Toei always wanted to utilize Yamcha and Chaozu more but may have been held back by Toriyama not really wanting to do anything with them, which is a shame since they have neat fighting styles IMO. I mean they even had them both take out members of the Ginyu Force in Z filler, I guess you could say Toei just wants to utilize the Earthlings more in general.
If Yamcha doesn't actually show up to the TOP I'd at least have him and Chaozu help out Goten & Trunks on the island just to give them something to do and make some neat "filler" material off of that, they're basically the definition of advertised extras at this point.
In fact nearly all the best Yamcha scenes back in DBZ came from the filler scenes with him.