yes. in all Pokemon games (or all the ones ive played) Pokemon evolve. But not every Pokemon evolves most do tho.
You can't evolve Yanma in Leafgreen. This is because Leafgreen was made before Yanmega was made. So basically in Leafgreen, Yanma is a Pokemon that can't evolve.
You can't on leafgreen.
you cannot evolve a porygon2 in leafgreen
no
No.
no
No.
you have to trade it to evolve.
Aerodactyl does not evolve lolk?
Rhydon, in Pokemon FR/LG, does not evolve.
Mamoswine doesn't evolve either way because it doesn't exist in Pokemon LeafGreen. It evolves from Piloswine who evolves from Swinub, but Piloswine can't evolve into Mamoswine in LeafGreen.
Gloom and Sunkern.