>>58213284
The English word championship has multiple meanings, it's being offered up there as a translation of 優勝 because it can mean "designation as champion" (which is basically what 優勝 means).
Of course, these dumbasses don't know that and only understand the word to mean "a contest held to determine a champion", and they also don't understand that the different translations offered in a single definition in a dictionary like >>58213273 are synonyms.

>>58213289
Yeah, that's the point. It's a "lol we just called the episode Kalos League Victory, we didn't tell you WHOSE victory" troll title, nips got just as angry as westerners about it.