The GB color had a similar intro right? I can't remember, I gave my GBC to a friend over 25 years ago.

> GSC were coded with GBC colors

Crystal had a much wider palette for the GBC because it was a GBC-exclusive game while GS had to be retrocompatible with the GB.

Gold and Silver had access to all the same colors as Crystal when played on a Game Boy Color. Where Crystal did improve the graphics was increasing the variety of tiles used on the overworld/dungeon maps, and adding animations to individual Pokémon in battle, both of which relied on the Game Boy Color’s increased VRAM.