19: Rattata

Kanto

	HeartGold	SoulSilver	FireRed	LeafGreen	Yellow	Red	Blue
Walking in tall grass or a cave
Pokémon Mansion			15% L26–28	15% L26–28
Pokémon Mansion 1F					30% L34–37
Pokémon Mansion 2F					30% L37–40
Pokémon Mansion 3F					30% L40–43
Pokémon Mansion B1F			5% L26	5% L26
Route 1			50% L2–4	50% L2–4
Route 1	+20% L2 +5% L6 +10% L2 +20% L3	+20% L2 +5% L6 +10% L2 +20% L3			30% L2–4	50% L2–4	50% L2–4
Route 10					20% L18
Route 11	20% L15 +10% L15	20% L15 +10% L15			30% L15–17
Route 16					25% L23–24	30% L18–22	30% L18–22
Route 16			30% L18–22	30% L18–22
Route 17			5% L22	5% L22
Route 18			5% L22	5% L22
Route 18					25% L23–24
Route 2			45% L2–5	45% L2–5
Route 2 south, towards Viridian City					35% L3–4	40% L2–5	40% L2–5
Route 22			45% L2–5	45% L2–5
Route 22	20% L3 +35% L3–7 +10% L3 +30% L3–5	20% L3 +35% L3–7 +10% L3 +30% L3–5			10% L3	45% L2–4	45% L2–4
Route 3	5% L10 +5% L8 +20% L5 +20% L5 +20% L5 +10% L5 +10% L5 +30% L5–8	+5% L8 +20% L5 +20% L5 +20% L5 +10% L5 +10% L5 +10% L5			15% L10–12
Route 4			35% L8–12	35% L8–12
Route 4	5% L10 +20% L5 +20% L5 +5% L8 +10% L5 +10% L5 +20% L8	+20% L5 +20% L5 +25% L5–8 +10% L5 +10% L5 +10% L5			15% L10–12	40% L8–12	40% L8–12
Route 5					30% L14–16
Route 6					30% L14–16
Route 7	20% L17 +10% L15–19 +5% L19 +10% L17	+5% L15			15% L20
Route 8					15% L20
Route 9			40% L14–17	40% L14–17
Route 9	+20% L15 +10% L15 +10% L15	+20% L13 +10% L15 +10% L13 +20% L15 +10% L15			15% L18	40% L14–17	40% L14–17
Sea Route 21					30% L13–15	30% L21–23	30% L21–23

Johto

	HeartGold	SoulSilver
Walking in tall grass or a cave
Bell Tower 10F	20% L22–24 +40% L20–21 +40% L20–21 +40% L20–22 +40% L20–22	20% L22–24 +40% L20–21 +40% L20–21 +40% L20–22 +40% L20–22
Bell Tower 2F	20% L22–24 +40% L20–21 +40% L20–21 +40% L20–22 +40% L20–22	20% L22–24 +40% L20–21 +40% L20–21 +40% L20–22 +40% L20–22
Bell Tower 3F	20% L22–24 +40% L20–21 +40% L20–21 +40% L20–22 +40% L20–22	20% L22–24 +40% L20–21 +40% L20–21 +40% L20–22 +40% L20–22
Bell Tower 4F	20% L22–24 +40% L20–21 +40% L20–21 +40% L20–22 +40% L20–22	20% L22–24 +40% L20–21 +40% L20–21 +40% L20–22 +40% L20–22
Bell Tower 5F	20% L22–24 +40% L20–21 +40% L20–21 +40% L20–22 +40% L20–22	20% L22–24 +40% L20–21 +40% L20–21 +40% L20–22 +40% L20–22
Bell Tower 6F	20% L22–24 +40% L20–21 +40% L20–21 +40% L20–22 +40% L20–22	20% L22–24 +40% L20–21 +40% L20–21 +40% L20–22 +40% L20–22
Bell Tower 7F	20% L22–24 +40% L20–21 +40% L20–21 +40% L20–22 +40% L20–22	20% L22–24 +40% L20–21 +40% L20–21 +40% L20–22 +40% L20–22
Bell Tower 8F	20% L22–24 +40% L20–21 +40% L20–21 +40% L20–22 +40% L20–22	20% L22–24 +40% L20–21 +40% L20–21 +40% L20–22 +40% L20–22
Bell Tower 9F	20% L22–24 +40% L20–21 +40% L20–21 +40% L20–22 +40% L20–22	20% L22–24 +40% L20–21 +40% L20–21 +40% L20–22 +40% L20–22
Burned Tower 1F	20% L13 +30% L13–15	20% L13 +30% L13–15
Burned Tower B1F	20% L14 +10% L16 +5% L14 +10% L16 +10% L14	20% L14 +10% L16 +5% L14 +10% L16 +10% L14
Mt. Mortar 1F	14% L14–16	14% L14–16
Mt. Mortar B1F	+20% L16	+20% L16
Mt. Mortar Lower Cave	10% L14	10% L14
Route 29	5% L4 +10% L2	+5% L4 +5% L2 +15% L2–4
Route 30	+30% L3–4 +10% L3	+30% L3–4 +10% L3
Route 31	+30% L4–5 +10% L4	+30% L4–5 +10% L4
Route 32	20% L4 +5% L6 +10% L4–6 +10% L4	+5% L6 +10% L4–6
Route 33	30% L6–7 +5% L4 +10% L7 +20% L6	10% L6 +5% L4 +20% L6
Route 34	5% L13 +20% L11 +10% L11	5% L13 +20% L11 +10% L11
Route 38	+20% L16 +10% L16 +10% L16
Route 39	20% L16 +10% L16 +10% L16
Route 46	5% L4 +20% L2 +20% L2 +10% L2	5% L4 +20% L2 +20% L2 +10% L2
Sprout Tower 2F	15% L3–5 +45% L3–6 +45% L3–6 +40% L3–5 +40% L3–5	15% L3–5 +45% L3–6 +45% L3–6 +40% L3–5 +40% L3–5
Sprout Tower 3F	15% L3–5 +45% L3–6 +45% L3–6 +40% L3–5 +40% L3–5	15% L3–5 +45% L3–6 +45% L3–6 +40% L3–5 +40% L3–5
Tohjo Falls	5% L20	5% L20
Union Cave 1F	10% L4	30% L4–6 +10% L6
Union Cave B1F	5% L6	25% L6–8 +10% L8
Union Cave B2F	5% L20	5% L20
Unknown; all Rattata	60% L20 +40% L20	60% L20 +40% L20

Sinnoh

	Platinum	Diamond	Pearl
Walking in tall grass or a cave
Route 225	4% L47 +1% L47	4% L20 +1% L22	4% L20 +1% L22
Sea Route 226	4% L47 +1% L47	4% L20 +1% L22	4% L20 +1% L22