Bubble

Flip a coin. If heads, your opponent’s Active Pokémon is now Paralyzed.

Withdraw

Flip a coin. If heads, during your opponent’s next turn, prevent all damage done to this Pokémon by attacks.

Flip a coin. If heads, during your opponent's next turn, prevent all damage done to this Pokémon by attacks.

Cosmos Reverse Holo 5-pack Mini Tins + 4 Promo (Costco) 

Flip a coin. If heads, the Defending Pokémon is now Paralyzed.

Flip a coin. If heads, your opponent's Active Pokémon is now Paralyzed.

Flip a coin. If heads, this attack does 20 more damage.

Flip a coin. If heads, prevent all damage done to Squirtle during your opponent's next turn. (Any other effects of attacks still happen.)

Found in Shadowless Print Run Booster Packs

Flip a coin. If heads, the Defending Pokémon is now Asleep.

After your attack, you may switch Squirtle with 1 of your Benched Pokémon.

Hiroki Yano - B-L-S - 2006 World Championships Deck

Flip a coin. If heads, prevent all damage done to Squirtle during your opponent's next turn. (Any other effects of opponent's attacks still happen.)

Flip a coin for each Water Energy attached to Squirtle. This attack does 20 damage plus 10 more damage for each heads.