Non-canon means that it doesn't exist within the main timeline of a certain series. The best explanation is that non-canon stuff takes place in an alternate universe not the main universe, which means they don't affect one another. If Ash's Bulbsaur evolved in a non-canon episode, then the next time we saw the main series and Ash used a Pokemon, he would use Bulbsaur not Ivysaur because it's evolution didn't happen in the main series.
Originally Posted by Geekachu
Movies, probably are the best example of this (although subjective), because they kind of do look like they take place in an alternate universe, aside from the Pokemon and main characters they really don't seem to be connected to the main series at all but there have been examples proving otherwise (although again subjective)
However the individual episodes cannot be non-canon regardless of the episode's plot because they are a part of the main series. The writers made them, and if they wished, they could bring the plot of an episode into a future episode, if it was entirely non-canon, they really couldn't do that because bringing up then makes what was non-canon, canon.
Misinterpreting my posts is not your fault, negative repping me, and getting very sensitive about my posts because you misinterpreted my posts however is your fault. Think really hard, before negative repping or making a big deal about my posts. I don't appreciate being negative repped for reasons that are a result of misinterpreting my posts.