Ascended Heroes

Basic

{Colorless} Growl
During your opponent's next turn, attacks used by the Defending Pokémon do 20 less damage (before applying Weakness and Resistance).
{Grass}{Grass} Seed Bomb 30

Weakness {Fire} ×2

Retreat {Colorless}

Chikorita

Mega Evolution

{Grass} Razor Leaf 20

Weakness {Fire} ×2

Retreat {Colorless}

MEP Black Star Promos

{Grass}{Colorless} Razor Leaf 30

Weakness {Fire} x2

Retreat {Colorless}

{Grass} Razor Leaf 20

Weakness {Fire} x2

Retreat {Colorless}

Wisdom of Sea and Sky

{Grass} Razor Leaf 20

Weakness {Fire} +20

Retreat {Colorless}

Macdonald's Collection 2021

{Grass} Mini Drain 10
Heal 10 damage from this Pokémon.

Weakness {Fire} x2

Retreat {Colorless}

Lost Thunder

{Colorless} Synthesis
Search your deck for a Grass Energy card and attach it to 1 of your Pokémon. Then, shuffle your deck.
{Grass}{Colorless} Razor Leaf 20

Weakness {Fire} ×2

Retreat {Colorless}

{Grass} Mini Drain 10
Heal 10 damage from this Pokémon.

Weakness {Fire} ×2

Retreat {Colorless}

Generations

{Colorless} Run Around
Switch this Pokémon with 1 of your Benched Pokémon.
{Grass}{Colorless} Vine Whip 20

Weakness {Fire} ×2

Retreat {Colorless}

BREAKpoint

{Colorless} Tackle 10
{Grass}{Colorless} Blot 10
Heal 10 damage from this Pokémon.

Weakness {Fire} ×2

Retreat {Colorless}

Call of Legends

{Colorless} Nap
Remove 1 damage counter from Chikorita.
{Grass}{Colorless} Reckless Charge 30
Chikorita does 10 damage to itself.

Weakness {Fire} x2

Resistance {Water} -20

Retreat {Colorless}

HeartGold SoulSilver

{Grass} Tackle 10
{Grass}{Colorless} Razor Leaf 20

Weakness {Fire} ×2

Resistance {Water} -20

Retreat {Colorless}

Mysterious Treasures

 Sleep Scent
Flip a coin. If heads, the Defending Pokémon is now Asleep.
{Grass} Jump On 10+
Flip a coin. If heads, this attack does 10 damage plus 10 more damage.

Weakness {Fire} +10

Resistance {Water} -20

Retreat {Colorless}

Dragon Frontiers

{Colorless} Sleep Powder
The Defending Pokémon is now Asleep.
{Colorless}{Colorless} Tackle 20

Weakness {Fire} ×2

Resistance {Water} -30

Retreat {Colorless}

Chikorita δ

Unseen Forces

{Colorless} Headbutt 10
{Grass}{Colorless} Razor Leaf 20

Weakness {Fire} ×2

Resistance {Water} -30

Retreat {Colorless}

Hidden Legends

{Colorless} Poisonpowder
Flip a coin. If heads, the Defending Pokémon is now Poisoned.

Weakness {Fire} ×2

Resistance {Water} -30

Retreat {Colorless}

Expedition Base Set

{Colorless} Hypnotic Gaze
The Defending Pokémon is now Asleep.
{Grass}{Colorless} Double Scratch 20×
Flip 2 coins. This attack does 20 damage times the number of heads.

Weakness {Fire} x2

Resistance {Water} -30

Retreat {Colorless}

{Grass} Razor Leaf 10
{Colorless}{Colorless} Sleep Powder 10
The Defending Pokémon is now Asleep.

Weakness {Fire} x2

Resistance {Water} -30

Retreat {Colorless}

Neo Genesis

{Colorless} Tackle 10
{Grass} Deflector
During your opponent's next turn, whenever Chikorita takes damage, divide that damage in half (rounded down to the nearest 10). (Any other effects still happen.)

Weakness {Fire} ×2

Retreat {Colorless}

{Colorless} Growl
If the Defending Pokémon attacks Chikorita during your opponent's next turn, any damage done to Chikorita is reduced by 10 (before applying Weakness and Resistance). (Benching or evolving either Pokémon ends this effect.)
{Grass}{Colorless} Razor Leaf 20

Weakness {Fire} ×2

Retreat {Colorless}