In English Yellow on Super Game Boy mode. A miscolored green region of the star is visible here, as is some of the Game Freak text missing.
The Game Freak logo artefacts occur in Pokémon Red, Green, Blue, and Yellow while they are run in Super Game Boy mode. It does not occur with Pokémon Yellow in Game Boy Color mode.
During the intro sequence where a star passes diagonally through the Game Freak logo, about half-way through a miscoloration of the star and missing parts of the "Game Freak" text can briefly be seen.