User blog comment:KidVegeta/Canonicity/@comment-4640094-20101008142154/@comment-1821137-20101008204047

Plotholes:
 * Interestingly, when Goten and Trunks fuse and accidentally become Fat Gotenks, they seem to be able to fuse right away after they defuse. However, they should not be able to do so as it was stated that an hour of rest was needed between each fusion.
 * During the ending sequence, it shows Goku in the first Dragon Ball episode, strangely he's in the clothes Master Roshi gave him near the start of 21st World Martial Arts Tournament. But this is impossible, at that time he didn't even know Master Roshi.