>>52848400Shudo originally didn't want subtitles on that episode. For him he wanted Pokémon to be creatures different from humans and he didn't like anthropomorphism the Pokémon in his scripts but he had to out of necessity.
In that episode he didn't want subtitles because it would humanized the Pokémon too much, to him Pokémon represented the natural world and one of the core ideas Shudo had was how humans can't comprehend things around them, in this case being animals. The t-rex movie subcontext was going to be that.