Weight	Base Power
Under 10kg Under 22lbs	20
10.1kg - 25kg 22.1lbs - 55lbs	40
25.1kg - 50kg 55.1lbs - 110lbs	60
50.1kg - 100kg 110.1lbs - 220lbs	80
100.1kg - 200kg 220.1lbs - 440lbs	100
Over 200kg Over 440lbs	120

Below are the Pokémon that get 40 power damage with Grass Knot/Low Kick used against them

No.	Pic	Name	Type 1	Type 2
#002		Ivysaur
#005		Charmeleon
#008		Wartortle
#020		Raticate
#027		Sandshrew
#030		Nidorina
#033		Nidorino
#038		Ninetales
#040		Wigglytuff
#045		Vileplume
#049		Venomoth
#054		Psyduck
#058		Growlithe
#060		Poliwag
#061		Poliwhirl
#063		Abra
#066		Machop
#071		Victreebel
#074		Geodude
#083		Farfetch'd
#100		Voltorb
#117		Seadra
#118		Goldeen
#131		Lapras
#135		Jolteon
#140		Kabuto
#148		Dragonair
#153		Bayleef
#156		Quilava
#163		Hoothoot
#165		Ledyba
#170		Chinchou
#171		Lanturn
#178		Xatu
#180		Flaaffy
#190		Aipom
#213		Shuckle
#223		Remoraid
#225		Delibird
#228		Houndour
#239		Elekid
#240		Magby
#253		Grovyle
#256		Combusken
#261		Poochyena
#263		Zigzagoon
#268		Cascoon
#277		Swellow
#281		Kirlia
#287		Slakoth
#291		Ninjask
#293		Whismur
#300		Skitty
#302		Sableye
#303		Mawile
#307		Meditite
#309		Electrike
#313		Volbeat
#314		Illumise
#316		Gulpin
#318		Carvanha
#322		Numel
#328		Trapinch
#329		Vibrava
#334		Altaria
#340		Whiscash
#341		Corphish
#343		Baltoy
#345		Lileep
#347		Anorith
#352		Kecleon
#354		Banette
#355		Duskull
#360		Wynaut
#361		Snorunt
#368		Gorebyss
#369		Relicanth
#387		Turtwig
#391		Monferno
#394		Prinplup
#397		Staravia
#398		Staraptor
#399		Bidoof
#407		Roserade
#414		Mothim
#424		Ambipom
#426		Drifblim
#434		Stunky
#438		Bonsly
#439		Mime Jr.
#440		Happiny
#443		Gible
#447		Riolu
#451		Skorupi
#453		Croagunk
#457		Lumineon