#087 Dewgong
waterice
LV54
The last four, then the rival
Indigo Plateau
Doors open only once. No going back to heal. Travel with revives.
#091 Cloyster
waterice
LV53
#080 Slowbro
waterpsychic
LV54
#124 Jynx
icepsychic
LV56
#131 Lapras
waterice
LV56
#095 Onix
rockground
LV53
#107 Hitmonchan
fighting
LV55
#106 Hitmonlee
fighting
LV55
#095 Onix
rockground
LV56
#068 Machamp
fighting
LV58
#094 Gengar
ghostpoison
LV56
#042 Golbat
poisonflying
LV56
#093 Haunter
ghostpoison
LV55
#024 Arbok
poison
LV58
#094 Gengar
ghostpoison
LV60
#130 Gyarados
waterflying
LV58
#148 Dragonair
dragon
LV56
#148 Dragonair
dragon
LV56
#142 Aerodactyl
rockflying
LV60
#149 Dragonite
dragonflying
LV62
Triggers if you defeated him at Oak's Lab and Route 22 (first visit).
#028 Sandslash
ground
LV61
#065 Alakazam
psychic
LV59
#103 Exeggutor
grasspsychic
LV61
#091 Cloyster
waterice
LV61
#038 Ninetales
fire
LV61
#135 Jolteon
electric
LV65
Triggers if you won one of the early battles, but lost/skipped the other.
#028 Sandslash
ground
LV61
#065 Alakazam
psychic
LV59
#103 Exeggutor
grasspsychic
LV61
#091 Cloyster
waterice
LV61
#082 Magneton
electric
LV61
#136 Flareon
fire
LV65
Triggers if you lost/skipped both early game battles.
#028 Sandslash
ground
LV61
#065 Alakazam
psychic
LV59
#103 Exeggutor
grasspsychic
LV61
#038 Ninetales
fire
LV61
#082 Magneton
electric
LV61
#134 Vaporeon
water
LV65