i dont think never i never saw bulma nude in the series actually in Dragon Ball episode 71 Deadly Battle 7 min and 47 sec in during the 3rd fight krillin pulls down bulma's top and for a split second...
HAHA well there are a couple he is nude in the very first episode when he is young and i cant rememeber the exact episode but very close to the end of dragon ball z when majin boo is their friend
Gotenks doesn't technically appear in a Dragon Ball Movie but in a Dragon Ball T.V special- "Yo! Son Goku and His Friends Return!"this special can be viewed at http://dbzepisode.org