#20: Sabrina
because she does a lot for her own Pokemon.
#19: Brock's Diglett
because it can kill Jigglypuff in a couple moves
#18: Koga's Pidgey
because it is Pokemon searcher with wings
#17: Erika's Ivysaur
because of the double razor leaf can do 80 in two flips
#16: Blaine's Dodrio
because it can deliver 50 in a one hits
#15: Promo Dragonite
because in one flip it can kill low level pokemon
#14:Brock's Dugtrio
because on it Earthquake attack
#13: Sabrina's Jynx
because of it's Helping Hand can draw you a lot of cards
in only one energy
#12: Sabrina's Haunter
because of Night Spirits it can do a total of 150 (if lucky and
have a full bench of Gastlys and the rest).
#11:Sabrina's Golduck
because of the damage shift because it acts like a Alakazam.
#10: Rocket's Mewtwo
because it has three attacks and of Psyburn.
#9: Rocket's Zapdos
because of the high hit points and damage
#8: Koga's Beedrill
if you are lucky it is a good card and it deal out a cool
70 damage
#7: Giovanni's Machamp
because it can deal out a big 120 damage if coin flip is good.
#6: Sabrina's Alakazam
because it can do 60 and if you have two alakazam it can swap
damage.
#5: Sabrina's Gengar
Shadow Bind makes you not retreat next turn.
#4:Erika's Venasaur
because it does 20 direct and does 20 to two benched pokemon
#3: Giovanni's Nidoqueen
Because of the Love Lariat it can do 0 or 100 if you have a
Giovanni's Nidoking on bench
#2: Giovanni's Nidoking
because of Rolling Attack can do 40 or 70
*****#1********
Blaine's Arcanine
because it can 40 or 120 it can kill a Charizard in one move.