Professor Oak's Lab (Pokémon Red and Blue) on Mario Paint Composer
Getting the video into a suitable quality was harder than actually making this. That doesn't mean this composition sucks, it just means it was easy.
This tune plays in Professor Oak's lab in Red/Blue/Yellow/Gold/Silver/Crystal/FireRed/LeafGreen, and on the PokéGear radio in Gold/Silver/Crystal/HeartGold/SoulSilver. It does not play in the lab in HG/SS, but you'll still be hearing it a lot.