Game Freak had to remake Pokémon models for Sword/Shield - Pokémon Sword/ Shield - Gamereactor

An interview from last month resurfaced after continued concerns about the new game, extending beyond the Pokédex alone.

Steam Workshop::Victor & Gloria [Pokémon Sword & Shield]

Pokemon Sword and Shield Aren't Recycling 3D Models, Game Freak Confirms - IGN

Steam Workshop::Pokemon Sword and Shield: Victor with all cosmetics

Pokémon Sword,Pokémon Shield Review - Pokémon Sword & Shield Review – Maxing Out The Pokémon Formula - Game Informer

Game Freak claims it is not reusing Pokemon models in Sword/Shield

News - November, 2022

POKEMON MODEL REMAKE: The TRUTH

Gamefreak had to make 721 pokemon models from scratch for Pokemon X/Y. Why is it suddenly too much work to do it for Sword/Shield? : r/pokemon

Pokémon Brilliant Diamond/Shining Pearl - The most interesting additions and improvements Preview - Gamereactor