So a few interesting things worth noting about the 21th World Tournament:
Krillin defeating Bacterian because he doesn’t have a nose is funny on it’s own but I’m wondering if Toriyama wrote that as part of Krillin’s character (him being born without a nose) or if he got fan letters pointing out how Krillin has no nose and then he decided to write a joke around it.
Goku being able to grow his tail back was always something that bothered me, I get that his tail is apart of his character so it makes sense for him to have it but him just growing it back always felt off especially since later on in the series it would just permanently never grow back. You also have to take into account the fact that this also never seems to happen for the other characters like Vegeta, Trunks or Goten so either it does grow back or doesn’t one or the other.
There’s something to be said about just how powerful Roshi is if he is capable of destroying the moon with a Kamehameha wave, though I suppose power in energy beams has been shown to be a greater power outside of just muscle strength.
On a side note I like to think that he also ended up killing Monster Carrot who was still trapped on the moon.