91: Cloyster 93: Haunter

Gastly

92: Gastly

Kanto

	FireRed	LeafGreen	Yellow	Red	Blue
Walking in tall grass or a cave
Lost Cave item rooms	20% L40	20% L40
Lost Cave room 1	25% L38–40	25% L38–40
Lost Cave room 10	25% L38–40	25% L38–40
Lost Cave room 2	25% L38–40	25% L38–40
Lost Cave room 3	25% L38–40	25% L38–40
Lost Cave room 4	25% L38–40	25% L38–40
Lost Cave room 5	25% L38–40	25% L38–40
Lost Cave room 6	25% L38–40	25% L38–40
Lost Cave room 7	25% L38–40	25% L38–40
Lost Cave room 8	25% L38–40	25% L38–40
Lost Cave room 9	25% L38–40	25% L38–40
Pokémon Tower 3F	90% L13–19	90% L13–19	95% L18–25	90% L18–24	90% L18–24
Pokémon Tower 4F	86% L13–19	86% L13–19	95% L18–25	86% L18–24	86% L18–24
Pokémon Tower 5F	86% L13–19	86% L13–19	90% L21–27	86% L18–24	86% L18–24
Pokémon Tower 6F	85% L14–19	85% L14–19	90% L21–27	85% L19–24	85% L19–24
Pokémon Tower 7F	75% L15–19	75% L15–19	90% L23–29	75% L20–24	75% L20–24

Johto

	HeartGold	SoulSilver	Crystal	Gold	Silver
Walking in tall grass or a cave
Bell Tower 10F	+40% L20–21 +40% L20–22	+40% L20–21 +40% L20–22
Bell Tower 2F	+40% L20–21 +40% L20–22	+40% L20–21 +40% L20–22	+80% L20–22	+80% L20–22	+80% L20–22
Bell Tower 3F	+40% L20–21 +40% L20–22	+40% L20–21 +40% L20–22	+80% L20–22	+80% L20–22	+80% L20–22
Bell Tower 4F	+40% L20–21 +40% L20–22	+40% L20–21 +40% L20–22	+80% L20–22	+80% L20–22	+80% L20–22
Bell Tower 5F	+40% L20–21 +40% L20–22	+40% L20–21 +40% L20–22	+80% L20–22	+80% L20–22	+80% L20–22
Bell Tower 6F	+40% L20–21 +40% L20–22	+40% L20–21 +40% L20–22	+80% L20–22	+80% L20–22	+80% L20–22
Bell Tower 7F	+40% L20–21 +40% L20–22	+40% L20–21 +40% L20–22	+80% L20–22	+80% L20–22	+80% L20–22
Bell Tower 8F	+40% L20–21 +40% L20–22	+40% L20–21 +40% L20–22	+80% L20–22	+80% L20–22	+80% L20–22
Bell Tower 9F	+40% L20–21 +40% L20–22	+40% L20–21 +40% L20–22	+80% L20–22	+80% L20–22	+80% L20–22
Route 31			+5% L5
Route 32			+5% L7
Route 36			+5% L5
Sprout Tower 2F	+45% L3–6 +40% L3–5	+45% L3–6 +40% L3–5	+85% L3–6	+85% L3–6	+85% L3–6
Sprout Tower 3F	+45% L3–6 +40% L3–5	+45% L3–6 +40% L3–5	+85% L3–6	+85% L3–6	+85% L3–6

Sinnoh

	Platinum	Diamond	Pearl
Walking in tall grass or a cave
Eterna Forest	+4% L13 +4% L13
Lost Tower 1F	45% L17–20 +20% L17–19 +20% L17–19	40% L16–18 +10% L17 +10% L17	40% L16–18 +10% L17 +10% L17
Lost Tower 2F	45% L17–20 +20% L17–19 +20% L17–19	40% L17–19 +10% L18 +10% L18	40% L17–19 +10% L18 +10% L18
Lost Tower 3F	44% L18–21 +20% L18–20 +20% L18–20 +1% L21	40% L18–20 +10% L19 +10% L19	40% L18–20 +10% L19 +10% L19
Lost Tower 4F	40% L18–21 +20% L18–20 +20% L18–20 +1% L21 +4% L21 +4% L21 +4% L21 +4% L21 +4% L21	40% L19–21 +10% L20 +10% L20	40% L19–21 +10% L20 +10% L20
Lost Tower 5F	35% L19–22 +20% L19–21 +20% L19–21 +1% L22 +4% L22 +4% L22 +4% L22 +4% L22 +4% L22	40% L20–22 +10% L21 +10% L21	40% L20–22 +10% L21 +10% L21
Old Chateau 2F	100% L14–17	92% L12–15 +8% L16	92% L12–15 +8% L16
Old Chateau 2F left room	100% L14–17	92% L12–15 +8% L16	92% L12–15 +8% L16
Old Chateau 2F leftmost room	100% L14–17	92% L12–15 +8% L16	92% L12–15 +8% L16
Old Chateau 2F middle room	100% L14–17	92% L12–15 +8% L16	92% L12–15 +8% L16
Old Chateau 2F private room	100% L14–17	92% L12–15 +8% L16	92% L12–15 +8% L16
Old Chateau 2F right room	96% L14–17 +4% L17	92% L12–15 +8% L16	92% L12–15 +8% L16
Old Chateau 2F rightmost room	100% L14–17	92% L12–15 +8% L16	92% L12–15 +8% L16
Old Chateau dining room	100% L14–17	92% L12–15 +8% L16	92% L12–15 +8% L16
Old Chateau entrance	100% L14–17	92% L12–15 +8% L16	92% L12–15 +8% L16
Route 209		+10% L16	+10% L16
Turnback Cave before pillar 1	30% L15–17 +10% L16 +10% L16
Turnback Cave pillar 1	30% L15–17 +10% L16 +10% L16