well, scince ive seen that in the outline that trunks's flamethrower is going to be in esf, i must say that he only used it once, where as other characters used it much more. Vegeta uses it twice in book 25 of the manga (one of those times he used it to finish off jeice), and also uses it against puipui in babidi's ship, (theres probably more but i havent checked) also Nail used this attack against frieza in book 25, then later on in that book, when nail and piccolo fused, during frieza's fight with piccolo, piccolo used it again. Even cell used this attack, and ive seen other characters use it before, just i cant remember exactly when. Anyway, what im suggesting is, maybe adding this attack to piccolo as well (as far as i know he used it first) but only after the fusion with nail, maybe add it to vegeta, but that may give him an even larger arsenal which may unbalance the game but im not sure. Imo (and im not sure if this is the case) but trunks should only use it when in super sayajin form, as thats the only time he did in the series. Its a pretty generic attack, as all it requires in the dragonball world is to shoot a large blast of ki.
I dunno, shoot this down if you want but its just a suggestion that i feel is relevant.
I dunno, shoot this down if you want but its just a suggestion that i feel is relevant.