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.

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

3DS – Kyle's Korner

Pokemon Sword and Shield Model Remake is Not the Problem to Me

Game Freak explains the 1,000 staff, missing creatures, and leek size of Pokémon Sword and Shield - Polygon

Pokémon Brilliant Diamond and Shining Pearl - Wikipedia

Pokémon Brilliant Diamond and Shining Pearl - Wikipedia

Game Freak isn't recycling 3DS models in Pokémon Sword and Shield after all

3DS – Kyle's Korner

Game Freak reflects on the making of Pokemon Sword and Shield - Nintendo Everything : r/NintendoSwitch

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

Game Freak Is Not Budging On Missing Pokémon From 'Sword And Shield,' Fans Not Amused