Websites like Classroom 6x - Pokémon Radical Red (a popular 2021-era style, though linked here for context) allow you to play directly in a browser without installing software.
: Students often finished their work early in computer or English classes to justify playing on browser-based emulators pokemon radical red unblocked at school 2021
Access to Pokémon spanning from Generation 1 through Generation 8 (and later updates). Websites like Classroom 6x - Pokémon Radical Red