I'm a bit of a Dragon Ball enthusiast if you can't already tell by the profile pic.
Videl's pregnancy does NOT make GT canon, since Pan was actually seen in the final Z story of both the manga and the anime at that final tournament where Uub arrived and, in the open ended canonical ending to the series, Goku flew him away to train him.
Naw naw, you want a REAL mindscratcher? Bulma's older sister, Tights... yeah. Where DID she go?
And of course, the fact that Kuririn's daughter is named Marron, but he only named her that as a reference to his first girlfriend (PRETTY sure your wife would dump you if you tried that in real life), but get this, the appearance of his first girlfriend, as well as the whole Garlic Jr arc in and of itself, is filler, therefore non-canon. So even in the manga, the name of his daughter (which in the manga wasn't revealed until the very end) is a reference to a non-canon event... that'll tear your head in two just thinking about it.