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 80 power damage with Grass Knot/Low Kick used against them

No.	Pic	Name	Type 1	Type 2
#006		Charizard
#009		Blastoise
#024		Arbok
#031		Nidoqueen
#034		Nidoking
#042		Golbat
#055		Golduck
#062		Poliwrath
#064		Kadabra
#067		Machoke
#073		Tentacruel
#078		Rapidash
#080		Slowbro
#082		Magneton
#085		Dodrio
#086		Seel
#097		Hypno
#099		Kingler
#101		Electrode
#107		Hitmonchan
#108		Lickitung
#115		Kangaskhan
#121		Starmie
#122		Mr. Mime
#123		Scyther
#127		Pinsir
#128		Tauros
#142		Aerodactyl
#144		Articuno
#145		Zapdos
#146		Moltres
#157		Typhlosion
#160		Feraligatr
#169		Crobat
#181		Ampharos
#195		Quagsire
#199		Slowking
#207		Gligar
#214		Heracross
#219		Magcargo
#221		Piloswine
#227		Skarmory
#234		Stantler
#235		Smeargle
#241		Miltank
#246		Larvitar
#250		Ho-oh
#254		Sceptile
#257		Blaziken
#260		Swampert
#272		Ludicolo
#275		Shiftry
#295		Exploud
#296		Makuhita
#299		Nosepass
#304		Aron
#317		Swalot
#319		Sharpedo
#324		Torkoal
#326		Grumpig
#330		Flygon
#331		Cacnea
#332		Cacturne
#336		Seviper
#346		Cradily
#348		Armaldo
#364		Sealeo
#366		Clamperl
#374		Beldum
#381		Latios
#386		Deoxys
#388		Grotle
#392		Infernape
#395		Empoleon
#410		Shieldon
#436		Bronzor
#444		Gabite
#445		Garchomp
#448		Lucario
#452		Drapion
#458		Mantyke
#459		Snover
#467		Magmortar
#469		Yanmega
#475		Gallade
#488		Cresselia
#491		Darkrai