[quote=@Fabricant451]
<Snipped quote by Kuro>


They were also developing Little Town Hero at the same time and GameFreak only has like 100 dudes which is probably why LTH's one marketing strategy was "Hey the Undertale guy did the music" 
[/quote]

Well, according to this interview they had at least 200 or so GF employees working on SWSH + everyone else like the guys over at Creatures, Inc. that have worked on Pokemon in the past.

https://www.polygon.com/interviews/2019/10/24/20929597/game-freak-explains-the-1000-staff-missing-creatures-and-leek-size-of-pokemon-sword-and-shield