Caterpie -> Metapod (Attack decreases from 30 to 20, Speed decreases from 45 to 30)
Weedle -> Kakuna (Attack decreases from 35 to 25, Speed decreases from 50 to 35)
Beedrill -> Mega Beedrill (SAttack decreases from 45 to 15)
Poliwhirl -> Poliwrath (Speed decreases from 90 to 70)
Poliwhirl -> Politoed (Speed decreases from 90 to 70)
Magneton -> Magnezone (Speed decreases from 70 to 60)
Onix -> Steelix (Speed decreases from 70 to 30)
Tangela -> Tangrowth (Speed decreases from 60 to 50)
Scyther -> Scizor (Speed decreases from 105 to 65)
Electabuzz -> Electavire (Speed decreases from 105 to 95)
Magmar -> Magmortar (Speed decreases from 93 to 83)
Porygon2 -> Porygon-Z (Defense decreases from 90 to 70, SDefense decreases from 95 to 75)
Mewtwo -> Mega Mewtwo X (Defense decreases from 90 to 70)
Ampharos -> Mega Ampharos (Speed decreases from 55 to 45)
Murkrow -> Honchkrow (Speed decreases from 91 to 71)
Heracross -> Mega Heracross (Speed decreases from 85 to 75)
Remoraid -> Octillery (Speed decreases from 65 to 45)
Wurmple -> Silcoon (Attack decreases from 45 to 35, Speed decreases from 20 to 15)
Wurmple -> Cascoon (Attack decreases from 45 to 35, Speed decreases from 20 to 15)
Wingull -> Pelliper (Speed decreases from 85 to 65)
Surskit -> Masquerain (Speed decreases from 65 to 60)
Nincada -> Ninjask (Defense decreases from 90 to 45)
Nincada -> Shedinja (HP decreases from 31 to 1, Defense decreases from 90 to 45)
Sableye -> Mega Sableye (Speed decreases from 50 to 20)
Camerupt -> Mega Camerupt (Speed decreases from 40 to 20)
Trapinch -> Vibrava (Attack decreases from 100 to 70)
Anorith -> Armaldo (Speed decreases from 75 to 45)
Shelgon -> Salamence (Defense decreases from 100 to 80)
Combee -> Vespiquen (Speed decreases from 70 to 40)
Garchomp -> Mega Garchomp (Speed decreases from 102 to 92)
Abomosnow -> Mega Abomosnow (Speed decreases from 60 to 30)
Swadloon -> Leavanny (Defense decreases from 90 to 80)
Venipede -> Whirlipede (Speed decreases from 57 to 47)
Whirlipede -> Scolipede (Defense decreases from 99 to 89, SDefense decreases from 79 to 69)
Dwebble -> Crustle (Speed decreases from 55 to 45)
Karrablast -> Escavalier (Speed decreases from 60 to 20)
Tynamo -> Eelektrik (Speed decreases from 60 to 40)
Shelmet -> Accelgor (Defense decreases from 85 to 40, SDefense decreases from 65 to 60)
Larvesta -> Volcarona (Attack decreases from 85 to 60)
Scatterbug -> Spewpa (Attack decreases from 35 to 22, Speed decreases from 35 to 29)
Spewpa -> Vivillon (Defense decreases from 60 to 50)
Diancie -> Mega Diancie (Defense decreases from 150 to 110, SDefense decreases from 150 to 110)
Source
