The lowest (hardest) catch rates:
Articuno 003
Zapdos 003
Moltres 003
Mewtwo 003
Raikou 003
Entei 003
Suicune 003
Lugia 003
Ho-Oh 003
Beldum 003
Metang 003
Metagross 003
Regirock 003
Regice 003
Registeel 003
Latias 003
Latios 003
Rayquaza 003
Jirachi 003
Deoxys 003
Groudon 005
Kyogre 005
Quagsire 010
Clefable 025
Snorlax 025
Steelix 025
Scizor 025
Mantine 025
Skarmory 025
Chansey 030
Murkrow 030
Blissey 030
The highest (eaisiest to catch), all at 255:
Caterpie
Weedle
Pidgey
Rattata
Sandshrew
Zubat
Oddish
Diglett
Meowth
Poliwag
Bellsprout
Geodude
Magikarp
Sentret
Hoothoot
Ledyba
Spinarak
Wooper
Poochyena
Zigzagoon
Wurmple
Lotad
Seedot
Shroomish
Slakoth
Nosepass
Skitty
Numel
Spoink
Spinda
Trapinch
Swablu
Baltoy
Feebas
Spheal
Clamperl
