And yet there are plenty of episodes that focus on a specific Pokémon and we’re not focus on Goh and did not result in Goh catching that specific Pokémon.I point towards the diglet ep which basically has the same setup as this one, that is a pokemon causing a problem and them getting called to help.
It wasn’t an ep focused on goh, but the immediate solution they came up with is to catch them. Who catches them? The resident catch maniac.
Pointing to one specific episode that didn’t focus on Goh but did focus on a specific Pokémon that resulted in a capture from Goh does not automatically mean that every episode that focuses on a specific Pokémon that isn’t focus on Goh somehow has a higher chance of Goh getting that specific Pokémon.