The ability to SAVE wouldn't help the ones who can, because it can only help if there's a chance you win in the first place. Also, if anybody in this matchup is short on determination, it assuredly is not Goku, and even if that "doesn't count", there's still the asking-Shenron-to-save thing
uhh
chara doesnt care
just erase the whole world
and if they refuse
just go
"since when were you the ones in control?"
and
say goodbye
(also rick astley made a new song)
if Chara were to
then that would put Xeno in an "unpleasant mood"
plus i don't think Chara could even do that, as SAVE related powers rely on determination, and Goku, as a Saiyan, has a level of determination that is sort of high
chara.