assumes 12 atk + spc at level 6

TW=tail whip T=tackle MP=mega punch WG=water gun
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big bird: TWx2+MPx2
abra: MPx1 or Tx2 (DR)
rat: WGx2
bulb: TW + MP + T/MP
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bug: WGx2
other bug: MPx1 on high attack or WGx2
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bird WGx2
nido: MP + MP(low roll)/WG(high roll)
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rat MPx1 (high attack + extra EXP) or WGx2
ekans WGx2
zubat WGx2 (WG+MP if very low WG roll first turn)
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bird WGx2
nido: MP + WG(very high roll or crit MP first turn)/MP
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mankey WG + WG(very high roll or crit WG first turn)/MP
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ekans WGx2
zubat MPx1 on high attack or WGx2