I notice that some cakes look more rounded and bubbly, the wilton pan has square edged...How can I make it look more bubble edged?

Trim off the edges of the cake...

The weight of fondant will usually round the edges - you won't have to do anything special to get a rounded look. If you want it really rounded, then just use a serrated knife to gently remove the edges like plbennett_8 said

i think the ones i have done are pretty rounded. i used the wilton pan. once i smoothed out the icing and put on the fondant, it all rounded out nicely. The ones with the purple and blue bows are covered in Wilton fondant and the other is Satin Ice.