Standard/regional:

caterpie -> metapod -> butterfree: weedle -> kakuna -> beedrill: blipbug (regional) -> dottler (regional) -> orbeetle (regional): spinarak -> ariados: sewaddle -> swadloon -> leavanny: sizzlipede (regional) -> centiskorch (regional): trapinch -> vibrava -> flygon: burmy_plant (regional) -> wormadam_plant (regional) -> mothim (regional): burmy_sandy (regional) -> wormadam_sandy (regional): burmy_trash (regional) -> wormadam_trash (regional): cutiefly (regional) -> ribombee (regional): wurmple -> silcoon -> cascoon (regional) -> beautifly -> dustox (regional): larvesta (regional) -> volcarona (regional): venipede -> whirlipede -> scolipede:

Add picks:

Uncommon: venonat -> venomoth: ledyba -> ledian: pineco -> forretress: anorith -> armaldo: dewpider -> araquanid:

Rare: paras -> parasect: yanma -> yanmega: surskit -> masquerain: kricketot -> kricketune: joltik -> galvantula: snom -> frosmoth: nymble -> lokix:

Epic: nincada -> ninjask: combee -> vespiqueen: skorupi -> drapion: wimpod -> golisopod:

Hatches: scatterbug: grubbin:

Uniques:

scyther -> scizor (regional) -> kleavor (regional):

pinsir:

scyther -> scizor (regional) -> kleavor (regional):

shuckle:

heracross:

volbeat:

illumise:

durant:

poipole -> naganadel:

scyther -> scizor (regional) -> kleavor (regional):

Legendaries:

genesect:

buzzwole:

pheromosa:

naganadel: