51: Dugtrio

Kanto

	HeartGold	SoulSilver	FireRed	LeafGreen	Crystal	Gold	Silver	Yellow	Red	Blue
Walking in tall grass or a cave
Diglett's Cave	10% L19–29	10% L19–29	5% L29–31	5% L29–31	+10% L24 +10% L16 +10% L32	10% L19–29	10% L19–29	5% L29–31	5% L29–31	5% L29–31